English words starting with O

320 words starting with O with Hindi meaning, synonyms, antonyms and examples. Page 1 of 2.

• OafishadjectiveStupid, clumsy, awkward, or lacking good manners.
• OasisnounA fertile or pleasant place in the middle of a dry, barren, or difficult area, especiall…
• ObduracynounMeaning: Quality of being resistant to persuasion or softening influences.
• ObdurateadjectiveStubbornly refusing to change one’s opinion or course of action.
• ObedientadjectiveWilling to obey orders, rules, or instructions.
• ObeisancenounDeferential respect.
• ObelisknounA tall, narrow, four-sided stone pillar, usually ending in a pointed top.
• ObeseadjectiveExtremely overweight, especially in a way that may affect health.
• ObfuscateverbTo make something unclear, confusing, or difficult to understand.
• ObfuscationnounMeaning - The act of making something less clear and more difficult to understand, usual…
• ObituarynounA notice or article about a person’s death, often with details of their life.
• ObjectionableadjectiveUnpleasant, offensive, or unacceptable.
• ObjectiveadjectiveBased on facts and not influenced by personal feelings or opinions; impartial.
• ObjurgateverbTo rebuke or scold someone severely.
• ObligatedverbRequire or compel (someone) to undertake a legal or moral duty.
• ObligationnounRequire or compel (someone) to undertake a legal or moral duty.
• ObligatoryadjectiveRequired by a rule, law, or duty; compulsory.
• ObligeverbRequire or compel (someone) to undertake a legal or moral duty.
• ObliqueadjectiveNot straight or direct; slanting in direction or position, or expressed in an indirect w…
• ObliquelyadverbIn a way that is not direct.
• ObliterateverbCompletely destroy; wipe out.
• ObliterationnounThe act of removing all signs of something, either by destroying or covering it complete…
• OblivionnounA state of being completely forgotten or unaware of what is happening. (???????? / ???? …
• ObliviousadjectiveNot aware of something.
• ObliviousnessadjectiveMeaning: The fact of being not aware of something.
• OblongadjectiveHaving a long rectangular or oval shape.
• ObloquyNounStrong public criticism or verbal abuse; disgrace resulting from public condemnation.
• ObnoxiousadjectiveExtremely unpleasant, offensive, or annoying in behavior or character.
• ObnubilateverbTo darken, dim, or obscure something; make unclear or difficult to understand.
• ObsceneadjectiveOffensive, indecent, or morally shocking.
• ObscurantismnounThe practice of deliberately preventing somebody from understanding or discovering somet…
• ObscurantistnounA person who is deliberately vague./ A person who is opposit to the spread of knowledge
• ObscureadjectiveNot clearly expressed or easily understood.
• ObsequiousadjectiveExcessively obedient or attentive in a servile way.
• ObsequynounA funeral rite or ceremony (usually used in plural as obsequies).
• ObservantadjectiveQuick to notice things; paying careful attention to surroundings or details.
• ObservatorynounA room or building housing an astronomical telescope or other scientific equipment for t…
• ObsessedverbUnable to stop thinking about something.
• ObsessionnounAn excessive and uncontrollable thought, feeling, or interest that keeps occupying the m…
• ObsidiannounA naturally occurring dark volcanic glass formed when lava cools rapidly.
• Obsolescencenoun(The process of becoming obsolete or outdated and no longer used.)
• ObsoleteAdjectiveNo longer used because something new has been invented
• ObstaclenounA thing that blocks one’s way or prevents progress.
• ObstinacynounThe quality or condition of being stubbornness.
• ObstinateadjectiveStubbornly refusing to change one
• ObstinatelyadverbMeaning - In a way that shows that you refuse to change your opinions, way of behaving, …
• ObstreperousadjectiveNoisy and difficult to control; aggressively boisterous.
• ObstructverbTo block or get in the way of something or someone, or to prevent something from happeni…
• ObstructingverbBlock (an opening, path, road, etc.)
• ObstructionnounTo block or get in the way of something or someone, or to prevent something from happeni…
• ObstructionismnounMeaning- The practice of trying to prevent a parliament or committee from making progres…
• ObtainverbTo get or receive something.
• ObtrusiveadjectiveNoticeable in an unpleasant way; sticking out or forcing attention.
• ObtundverbTo make something less sharp, intense, sensitive, or severe.
• ObtuseadjectiveAnnoyingly insensitive or slow to understand.
• ObviateverbTo remove a need or difficulty; to prevent something undesirable.
• ObviatingverbRemoving a need or difficulty; preventing something from being necessary.
• ObviousadjectiveEasy to see, understand, or recognize.
• OccasionverbCause (something).
• OccasionallyadverbMeaning: Sometimes but not often.
• OccidentaladjectiveRelating to the Western part of the world, especially Europe and the Americas.
• OccludeverbBlock or obstruct (a passage, opening, or flow).
• OccultadjectiveRelating to hidden, mystical, or supernatural powers, practices, or phenomena.
• Occupantnouna person who lives or works in a particular house, room, building, etc.
• OccupiedverbReside or have one's place of business in (a building).
• OccupyverbReside or have one's place of business in (a building).
• OccupyingverbReside or have one's place of business in (a building).
• OccurverbHaving happened or taken place.
• OccurredVerbHaving happened or taken place.
• OccurrencenounHaving happened or taken place.
• OccurringverbHaving happened or taken place.
• OccursverbHaving happened or taken place.
• OceanographynounThe scientific study of oceans, including their physical, chemical, biological and geolo…
• OchlocracynounGovernment or rule by a mob or disorderly crowd.
• OctagonaladjectiveHaving eight sides and eight angles.
• OctavenounA series of eight musical notes.
• OctogenariannounA person who is between 80 and 89 years old.
• OcularadjectiveRelated to the eyes or vision.
• OdiousadjectiveExtremely unpleasant, offensive, or hateful.
• OdiumnounGeneral or widespread hatred or disgust directed toward someone as a result of their act…
• OdysseynounA long, eventful journey or series of experiences.
• OenologynounThe scientific study of wine and wine-making.
• Off guardphrasal verbUnprepared for a surprise or difficulty.
• Off kilteradjective(Unconventional or eccentric.)
• OffencenounAn act punishable by law; usually considered an evil act.
• OffendverbCommit an illegal act, cause to feel upset, annoyed, or resentful.
• OffendedverbTo hurt somebody’s feelings
• OffendernounA person who commits a crime.
• OffensiveadjectiveTo hurt somebody’s feelings.
• Offer the olive branchidiomTo extend an offer or gesture of peace, reconciliation, truce, etc. (to someone), so as …
• OffhandadjectiveSaid or done without previous thought or preparation; casual and sometimes slightly rude.
• OfficiousadjectiveIntrusively enthusiastic in offering help or advice; meddlesome.
• Offingnounlikely to appear or happen soon.
• OffloadverbRid oneself of (something) by selling or passing it on to someone else/relieve oneself o…
• OffsetverbTo use one cost, payment or situation in order to cancel or reduce the effect of another.
• Offsetting (v)Counteract something by having an equal and opposite force or effect.
• Offshootnoun(A thing that develops from something else),
• OffshoreadjectiveSituated at sea some distance from the shore.
• OffspringnounMeaning: the product or result of something; a person's child or children.
• OfftakenounThe removal of oil from a reservoir or supply.
• OgrenounA cruel or terrifying person.
• OleaginousadjectiveOily or greasy; also used to describe someone who is excessively flattering or insincere.
• OlfactoryadjectiveRelated to the sense of smell.
• OligarchynounA form of government where power is held by a small group of people.
• OligopolynounA market structure in which a few large sellers control or dominate the market.
• OligopsonynounA market situation in which there are only a few buyers but many sellers.
• OmbudsmannounAn independent official who investigates complaints made by people against a government …
• OminousadjectiveSuggesting that something bad is going to happen in the future.
• OminouslyadverbIn a way that suggests that something bad is going to happen.
• OmissionnounTo fail to include or do something.
• OmitverbTo leave out or exclude, either intentionally or accidentally.
• OmittedverbTo fail to include or do something.
• OmnibusnounComprising several items.
• OmnipotencenounTotal power.
• OmnipotentadjectiveHaving unlimited power; able to do anything.
• OmnipresentadjectivePresent everywhere at the same time; widespread.
• OmniscientadjectiveKnowing everything.
• OmnivorousadjectiveEating both plants and animals; having a wide variety of tastes or interests.
• OmphaloskepsisnounContemplation or meditation by gazing at one
• On a par withphrase(Equal in importance or quality to.)
• On a razor’s edgeidiomsTo the point of doing something risky or dangerous.
• On an even keelidiomWorking or progressing smoothly and steadily, without any sudden changes
• On (at) the heels ofphrase(Following closely after/ soon after something.)
• On its meritsphrasal(According to or based on facts or qualities essential to a person or situation/based on…
• On the back burneridiomsOn hold or suspended temporarily.
• On the face of itphrase(Without knowing all of the relevant facts; apparently.)
• On the front burneridiomsOf a high priority; given more or a lot of thought or attention.
• On the same pageverbOf two or more people, thinking in the same manner; having the same general outlook or p…
• On the waneidiom(Becoming weaker or less extensive.)
• OncologynounThe branch of medicine concerned with the study, diagnosis and treatment of cancer.
• OncomingadjectiveMeaning: moving towards one; due to happen soon.
• OneiricadjectiveRelating to dreams or resembling a dream.
• OneiromancynounDivination or prophecy by interpreting dreams. (????? ?? ???????? ?? ?????? ?? ??????????)
• OnerousadjectiveNeeding great effort.
• OngoingadjectiveContinuing to exist or develop
• OnlookernounA person who watches something happening without taking part.
• OnomatopoeianounThe formation of a word that imitates the natural sound associated with something.
• Onsetnounhe beginning or start of something, especially something unpleasant.
• OnslaughtnounA fierce or destructive attack or assault.
• OntendedverbHeated disagreement.
• OntologicaladjectiveConnected with the branch of philosophy that deals with the nature of existence.
• OntologynounThe branch of philosophy that studies existence and the nature of being.
• OnusnounThe responsibility for something.
• OozeverbTo flow or leak slowly through a small opening.
• OpacitynounThe quality of lacking transparency or translucence.
• OpalescentadjectiveShowing a milky or rainbow-like glow with changing colors, like an opal.
• OpaqueadjectiveNot able to be seen through; not transparent; also used for something hard to understand.
• OperateverbTo work, function, or control a machine, system, or organization.
• OphidiophobianounAn extreme or irrational fear of snakes.
• OphthalmologistnounA doctor who specializes in the treatment of eyes and eye diseases.
• OpineverbTo express an opinion or belief about something. (??? ????)
• OpportuneadjectiveOccurring at a suitable or convenient time; especially favorable or well-timed. (???????…
• OpposedadjectiveDisagreeing strongly with something and trying to stop it.
• OppressverbKeep in hardship or under control by using cruel or unfair authority.
• OppressionnounMeaning: prolonged cruel or unjust treatment or exercise of authority; the state of bein…
• OppressiveadjectiveInflicting harsh and authoritarian treatment.
• OppressorsnounOne who dominates someone by hard work or slavery.
• OpprobriousadjectiveExpressing strong criticism, insult, or disgrace.
• OpprobriumnounHarsh criticism or censure.)
• OppugnverbTo oppose, challenge, or dispute the truth or validity of something.
• OpsimathnounA person who begins to learn or study late in life. (???? ?? ??? ?? ??? ??? ????? ???? ?…
• OptedverbMake a choice from a range of possibilities.
• OpticaladjectiveRelated to sight, light, or the eyes.
• OptimaladjectiveThe best possible.
• OptimismnounA feeling that good things will happen and that something will be successful.
• OptimisticadjectiveHopeful and confident about the future or the success of something.
• OptimizeverbTo make something as effective, useful, or perfect as possible.
• OptimumadjectiveMost conducive to a favourable outcome
• OptingverbMake a choice from a range of possibilities.
• OpulentadjectiveExtremely rich, luxurious, and lavish in appearance, lifestyle, or style. (?????? / ????…
• OracularadjectiveResembling an oracle; mysterious, wise, and often difficult to understand.
• OrateverbMake a speech, especially pompously or at length.
• OratornounA speaker, especially one who is eloquent or skilled.
• Oratorynounthe skill of making powerful and effective speeches in public
• OrbitnounThe curved path followed by a planet, moon, or satellite around another object.
• OrchardnounA piece of land where fruit trees are grown.
• OrchestrateverbThe act of organizing or arranging something carefully to achieve a particular goal, oft…
• OrchestratedverbCarefully arranged or coordinated the elements of a situation to produce a desired effect
• OrchestratingverbThe act of organizing or arranging something carefully to achieve a particular goal, oft…
• OrdainverbOrder (something) officially.
• OrdealnounA very unpleasant, difficult, or painful experience, especially one that lasts for a lon…
• OrdinancenounAn authoritative order.
• OrdnancenounMilitary weapons, ammunition, and artillery used in warfare.
• OrganizeverbArrange or plan things in a proper order or structure.
• Orgynoun(an instance of excessive indulgence in a specified activity/ a wild party)
• OrientationnounDirected towards or interested in something.
• OrientedadjectiveDirected towards or interested in something.
• OrnamentaladjectiveServing as a decoration rather than being useful.
• OrnateadjectiveMade in an intricate shape or decorated with complex patterns; elaborately adorned.
• OrneryadjectiveBad-tempered, stubborn, and difficult to deal with.
• OrnithologynounThe scientific study of birds.
• OrogenynounThe geological process of mountain formation through movements of the Earth's crust.
• OrotundadjectiveHaving a voice that is full, strong, clear, and resonant.
• OrphanagenounA home or institution where children without parents are cared for.
• OrthodoxadjectiveFollowing or conforming to the traditional or generally accepted rules or beliefs of a r…
• OrthodoxynounAn idea or practice that is accepted by most people as being correct or usual.
• OrthogonaladjectiveRelating to or involving right angles; independent or unrelated.
• OrthographynounThe correct way of spelling words or the art of writing words with proper spelling.
• OrwellianadjectiveCharacteristic of an oppressive government, especially involving control, surveillance, …
• OscillateverbTo move or swing back and forth in a regular rhythm; to waver between opinions or actions.
• OsculateverbTo kiss or touch closely; in geometry, to touch at a point while sharing the same tangent.
• OssifiedadjectiveHaving become rigid or fixed in attitude or position.
• OssifyverbBecome rigid or hard; to turn into bone-like hardness or become inflexible.
• OstensibleadjectiveStated or appearing to be true, but not necessarily so.
• OstensiblyadverbAccording to what seems or is stated to be real or true, when this is perhaps not the ca…
• OstentatiousadjectiveDesigned to impress or attract notice; showy and pretentious.
• OstraciseverbExclude from a society or group.
• OstracisedverbExclude from a society or group
• OstracismnounThe act of deliberately not including somebody in a group or activity; the state of not …
• OstracizationnounBanishment from a society or group.
• Ostracizeverb(Exclude from a society or group.)
• OstracizedverbExclude from a society or group.
• OtioseadjectiveServing no practical purpose or result; useless or ineffective.
• OubliettenounA secret dungeon, typically with an opening only at the top, used to confine and
• Oughtmodal verbUsed to say what is the right thing to do
• OuncenounMeaning: a very small amount of something.
• OustverbTo force somebody out of a job or position of power, especially in order to take their p…
• OustedverbDrive out or expel (someone) from a position or place.
• OusternounForcible removal from an office/property/right; ouster (dispossession).
• OustingverbDrive out or expel (someone) from a position or place.
• Out of-the-boxphrase(Outside of or beyond what is considered usual, traditional, or conventional.)
• Out of touchidiomTo no longer have recent knowledge or information about something.
• OutagenounA period of time when the supply of electricity, etc. is not working.
• OutbreaknounA sudden start or spread of something harmful, such as disease, violence, or war.
• Outburstnoun(A sudden occurrence of a particular activity.)
• OutcastnounA person who is rejected or excluded from society or a group.
• OutcastsnounA person who has been rejected by society or a social group.
• OutclassverbSurpass someone or something decisively in quality, ability, or performance.
• OutcomenounThe final result or effect of an action, event, or process. (??????, ?????)
• OutcrynounA reaction of anger or strong protest shown by people in public.
• OutdatedadjectiveNo longer useful because of being old-fashioned.
• OutdoverbBe superior to in action or performance.
• OutflankverbTo move around the side of an opponent to gain an advantage.
• OutflankedverbTo cleverly get an advantage over someone, especially over an enemy.
• OutfoxverbDefeat or deceive someone by being more clever or cunning.
• OutgrowthnounSomething that develops or results from another thing; a natural development or conseque…
• OutlandishadjectiveLooking or sounding bizarre or unfamiliar.
• OutlastverbTo last longer than someone or something else.
• OutlawverbTo make something illegal or officially prohibit it.
• OutlawedadjectiveProhibited by law.
• OutlaynounAn amount of money spent for a specific purpose; expenditure. (????/????)
• OutliernounA person, thing, or result that is very different from others in a group.
• Outlinenoun/verbA general description or plan; to give the main points.
• OutliningverbTo give a description of the main facts or points involved in something.
• OutliveverbMeaning- To continue to exist after something else has ended or disappeared.
• OutlooknounMeaning: The likely future for somebody/something; what is likely to happen.
• OutlyingadjectiveSituated far from a centre;
• OutmaneuververbDefeat or gain an advantage over someone by using clever tactics or strategy.
• OutmanoeuvreverbEvade (an opponent) by moving faster or with greater agility.
• OutmodedadjectiveOld-fashioned and no longer useful or popular.
• OutpaceverbTo move, grow, or develop faster than someone or something else.
• OutperformverbTo perform better than someone or something else.
• OutpostnounA small military or official station far from the main area.
• Outpouringnouna strong and sudden expression of feeling
• OutragenounA strong feeling of shock and anger.
• OutrageousadjectiveVery unusual and intended to shock people slightly.
• OutrageouslyadverbMeaning: in a shockingly bad or excessive way.
• OutreachnounThe extent or length of reaching out.
• OutrightadjectiveOpen and direct.
• OutsellverbSell more of a product than another person, company, or product.
• OutsetnounThe beginning or start of something. (???? / ??????)
• OutshineverbTo be much better, more impressive or more successful than someone or something else.
• OutsmartverbTo defeat or deceive someone by being more intelligent or clever.
• OutsourceverbObtain goods or services from an outside supplier instead of doing the work internally.
• OutspentverbTo spend more money on something than somebody else.
• OutspokenadjectiveFrank and direct in expressing one’s opinions.
• OutstandingadjectiveExceptionally good or clearly better than others.
• OutstripverbMeaning: to get ahead of; exceed.
• Outstrippedverbto become larger, more important, etc. than somebody/something
• OutweighverbBe greater or more important than something else; exceed in value, influence, or signifi…
• OutwitverbTo defeat someone by using cleverness or intelligence.
• OvationnounAn enthusiastic display of appreciation, especially applause.
• OveralladjectiveGeneral.
• OverarchingadjectiveComprehensive and covering or affecting many things in a broad way.
• OveraweverbImpress (someone) so much that they are silent or inhibited.
• OverbearingadjectiveDomineering and excessively forceful; too confident and too demanding.
• OverblownadjectiveMade to seem more important, serious, or impressive than it really is.
• OvercastadjectiveCovered with clouds; dull and gloomy.
• OverchargeverbTo charge someone more money than the correct or reasonable amount.
• OvercomeverbSucceed in dealing with or controlling a problem or difficulty.
• OverdueadjectiveNot having arrived, happened, or been done by the expected time.
• OverhaulnounAn examination of a machine or system, including doing repairs on it or making changes t…
• OverhaulingverbTo repair an engine, machine, etc. so that every part of it works as it should.
• OverlapverbExtend over or cover a part of something else, especially partly or at the edges.
• OverlappedverbExtend over so as to cover partly
• OverlappingverbExtend over so as to cover partly
• OverloadverbTo put too great a load on something
• OverlookverbTo fail to notice, consider, or deal with something.
• OverlookedverbFail to notice
• OverplayverbMeaning: Give undue importance to.
• OverreachverbTo try to do more than is reasonable or allowed, especially by going beyond proper limits.
• OverrideverbTo use authority to reject, cancel, or change a decision, rule, or system.
• OverridingadjectiveMore important than anything else in a particular situation.
• OverruleverbTo reject or change a decision, objection, or opinion by using higher authority.
• OverseeverbTo supervise or watch over a process, work, or people to ensure it is done correctly.
• OvershadowverbAppear more important than something else, so that it is less noticed.
• OvershootverbTo go further than the place you intended to stop or turn.
• OversightnounAn unintentional failure to notice or do something.
• OverstateverbDescribe or represent something as greater, more serious, or more important than it actu…
• OverstepverbTo go beyond a limit, rule, or authority.