20 new English words for 21 December 2025, each with its meaning, Hindi meaning, synonyms, antonyms and an example sentence. Learn them today and revise them with the daily quiz — useful for SSC, Bank, Railway, UPSC and IELTS.

1 Concomitant (adjective)

Concomitant - Occurring or existing at the same time; accompanying something else.

Occurring or existing at the same time; accompanying something else.

Hindi meaning: सहवर्ती

Synonyms: Accompanying, Concurrent, Associated, Coinciding

Antonyms: Separate, Unrelated, Independent, Unconnected

Example: Increased traffic is a concomitant of rapid urban growth.

Trick: Think “con + come” — two things come together at the same time, so they are concomitant.

2 Reverberate (verb)

Reverberate - To echo or resound; to have continuing and serious effects.

To echo or resound; to have continuing and serious effects.

Hindi meaning: गूंजना

Synonyms: Echo, Resound, Reecho, Reverberate

Antonyms: Silence, Muffle, Hush, Suppress

Example: The sound of the explosion reverberated through the valley.

Trick: Re-VERB-erate = the “verb” (sound/voice) repeats again and again, like an echo.

3 Transmute (verb)

Transmute - Change in form, nature, or substance; transform into something else.

Change in form, nature, or substance; transform into something else.

Hindi meaning: रूपांतरित करना

Synonyms: Transform, Convert, Metamorphose, Change

Antonyms: Preserve, Maintain, Keep, Stabilize

Example: The story transmuted his fear into confidence over time.

Trick: Transmute = trans (across) + mutate (change) → change something across into a new form.

4 Misconstrue (verb)

Misconstrue - Interpret (something) wrongly; misunderstand the meaning.

Interpret (something) wrongly; misunderstand the meaning.

Hindi meaning: गलत समझना

Synonyms: Misinterpret, Misunderstand, Misconceive, Distort

Antonyms: Understand, Interpret, Comprehend, Grasp

Example: Don’t misconstrue my silence as agreement.

Trick: Misconstrue = “miss” the meaning and “construe” it wrong, yani baat ko galat samajh lena.

5 Incongruous (adjective)

Incongruous - Not in harmony or keeping with the surroundings; out of place.

Not in harmony or keeping with the surroundings; out of place.

Hindi meaning: बेमेल

Synonyms: Incompatible, Inappropriate, Unsuitable, Discordant

Antonyms: Compatible, Appropriate, Suitable, Harmonious

Example: His casual jokes seemed incongruous during the serious meeting.

Trick: Incongruous = “in” (not) + “congruous” (matching) = not matching, bilkul out of place.

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6 Corollary (noun)

Corollary - A direct or natural result that follows from something else.

A direct or natural result that follows from something else.

Hindi meaning: परिणामस्वरूप निष्कर्ष

Synonyms: Consequence, Result, Outcome, Implication

Antonyms: Cause, Origin, Source, Beginning

Example: A corollary of better education is improved employment opportunities.

Trick: Corollary = “core” se logically jo cheez follow ho, wahi corollary (direct result).

7 Interpolate (verb)

Interpolate - Insert (something) between fixed points; estimate an unknown value within a range using known values.

Insert (something) between fixed points; estimate an unknown value within a range using known values.

Hindi meaning: बीच में जोड़ना

Synonyms: Insert, Interject, Introduce, Estimate

Antonyms: Remove, Delete, Extract, Omit

Example: The editor interpolated a clarifying sentence between the two paragraphs.

Trick: Interpolate = “inter” (between) + “polate” (place/put) so beech me kuch add karna ya beech ka value nikalna.

8 Umbrage (noun)

Umbrage - Offense or annoyance caused by something perceived as an insult.

Offense or annoyance caused by something perceived as an insult.

Hindi meaning: नाराज़गी

Synonyms: Offense, Resentment, Annoyance, Displeasure

Antonyms: Pleasure, Approval, Delight, Satisfaction

Example: She took umbrage at his rude remark.

Trick: Umbrage sounds like “umbrella” — chhoti si baat par umbrella ki tarah gussa khol lena = take umbrage.

9 Nondescript (adjective)

Nondescript - Lacking distinctive or interesting features; ordinary and unremarkable.

Lacking distinctive or interesting features; ordinary and unremarkable.

Hindi meaning: साधारण

Synonyms: Unremarkable, Ordinary, Plain, Featureless

Antonyms: Distinctive, Remarkable, Striking, Unique

Example: He lived in a nondescript building that looked like every other block.

Trick: Non + describe = jisko describe karne layak kuch khaas na ho, wahi nondescript.

10 Implacable (adjective)

Implacable - Unable to be appeased or pacified; not forgiving.

Unable to be appeased or pacified; not forgiving.

Hindi meaning: अडिग / कठोर

Synonyms: Unforgiving, Unappeasable, Relentless, Inexorable

Antonyms: Forgiving, Merciful, Lenient, Appeasable

Example: The implacable enemy refused every offer of peace.

Trick: Imagine someone “I’m placable” nahi bolta — jo placate (shaant) hi na ho, wahi implacable.

11 Astringent (adjective)

Astringent - Sharp or harsh in taste or smell; causing the skin or tissues to tighten.

Sharp or harsh in taste or smell; causing the skin or tissues to tighten.

Hindi meaning: कसैला / संकोचक

Synonyms: Harsh, Bitter, Acrid, Caustic

Antonyms: Mild, Gentle, Soothing, Smooth

Example: The astringent toner tightened her pores and reduced oiliness.

Trick: Think AS-STRING-ent = it feels like your skin is pulled by strings and gets tight, or the taste is so harsh it makes your mouth shrink.

12 Reprehensible (adjective)

Reprehensible - Deserving strong criticism or blame; morally wrong.

Deserving strong criticism or blame; morally wrong.

Hindi meaning: निंदनीय

Synonyms: Blameworthy, Culpable, Deplorable, Shameful

Antonyms: Praiseworthy, Admirable, Commendable, Virtuous

Example: Cheating in an exam is reprehensible behavior and ruins trust.

Trick: Reprehensible = re-press + horrible kind of act; something so wrong that people will press you with criticism again and again.

13 Insoluble (adjective)

Insoluble - Impossible to solve or explain; not able to be dissolved in a liquid.

Impossible to solve or explain; not able to be dissolved in a liquid.

Hindi meaning: असमाधेय / अघुलनशील

Synonyms: Unsolvable, Intractable, Unresolvable, Indissoluble

Antonyms: Solvable, Resolvable, Manageable, Soluble

Example: The committee faced an insoluble problem because no option satisfied all sides.

Trick: In + soluble = not soluble; either it won’t dissolve in water, or it won’t dissolve as a problem because no solution exists.

14 Inextricable (adjective)

Inextricable - Impossible to separate, disentangle, or escape from.

Impossible to separate, disentangle, or escape from.

Hindi meaning: अविभाज्य / उलझा हुआ जिसे अलग न किया जा सके

Synonyms: Inseparable, Entangled, Interwoven, Indissoluble

Antonyms: Separable, Detachable, Unconnected, Distinct

Example: Culture and language are inextricable parts of a community’s identity.

Trick: In-extricate = you cannot extricate (get out) from it; like two wires so tangled that you can’t separate them.

15 Reverent (adjective)

Reverent - Showing deep respect; feeling or expressing devotion and honor.

Showing deep respect; feeling or expressing devotion and honor.

Hindi meaning: श्रद्धापूर्ण / आदरपूर्ण

Synonyms: Respectful, Devout, Venerating, Worshipful

Antonyms: Irreverent, Disrespectful, Flippant, Contemptuous

Example: The audience remained reverent during the memorial ceremony.

Trick: Reverent sounds like revere = if you revere someone, you naturally act reverent with deep respect.

16 Indemnify (verb)

Indemnify - Compensate someone for loss or damage; protect someone against legal responsibility.

Compensate someone for loss or damage; protect someone against legal responsibility.

Hindi meaning: क्षतिपूर्ति करना / क्षतिपूर्ति की गारंटी देना

Synonyms: Compensate, Reimburse, Repay, Insure

Antonyms: Penalize, Charge, Withhold, Harm

Example: The company agreed to indemnify the customer for any financial loss caused by the defect.

Trick: Indemnify = in-damn-fine protection; if something goes wrong, insurance will pay you back and save you from loss.

17 Amortize (verb)

Amortize - Pay off a debt gradually over time through regular payments; spread the cost of an asset over a period.

Pay off a debt gradually over time through regular payments; spread the cost of an asset over a period.

Hindi meaning: किस्तों में चुकाना / लागत को अवधि में बाँटना

Synonyms: Repay, Liquidate, Settle, Spread

Antonyms: Accumulate, Borrow, Increase, Inflate

Example: The firm decided to amortize the equipment cost over five years.

Trick: Amortize = a-more-time payments; you clear the loan by paying a little bit more time after time.

18 Promissory (adjective)

Promissory - Containing or implying a promise to pay or do something, especially in finance.

Containing or implying a promise to pay or do something, especially in finance.

Hindi meaning: वचन-पत्र संबंधी / भुगतान का वादा करने वाला

Synonyms: Assuring, Pledging, Obligatory, Committed

Antonyms: Nonbinding, Unpromising, Uncertain, Doubtful

Example: He signed a promissory note agreeing to repay the loan within six months.

Trick: Promissory = sounds like promise ; a promissory note is literally a written promise to pay later.

19 Imperturbable (adjective)

Imperturbable - Not easily upset or disturbed; staying calm even in stressful situations.

Not easily upset or disturbed; staying calm even in stressful situations.

Hindi meaning: अविचल / शांतचित्त

Synonyms: Unflappable, Composed, Unshakeable, Stoic

Antonyms: Agitated, Anxious, Flustered, Disturbed

Example: Even during the crisis, the captain remained imperturbable and gave clear orders.

Trick: Im-perturb-able = not perturbable ; nothing can disturb you, so you stay calm no matter what happens.

20 Unforgivingly (adverb)

Unforgivingly - In a harsh or strict way; without mercy, leniency, or forgiveness.

In a harsh or strict way; without mercy, leniency, or forgiveness.

Hindi meaning: निर्दयता से / कठोरता से / बिना माफी के

Synonyms: Harshly, Severely, Ruthlessly, Relentlessly

Antonyms: Leniently, Gently, Mercifully, Forgivingly

Example: The judge spoke unforgivingly about the repeated violations of the law.

Trick: Un + forgiving + ly = without forgiving ; picture a super strict teacher checking your paper unforgivingly, cutting marks for every tiny mistake.

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