Martyr(noun)
A person who is killed because of their religious or political beliefs.
Hindi meaning:शहीद
Synonyms: Hero, Sacrifice, Victim, Patriot
Antonyms: Betrayer, Traitor, Coward, Oppressor
Example: He was hailed as a martyr for giving his life for the country.
Trick to remember: Mar = die + tyr = for a cause; martyr = jo belief/country ke liye jaan de de.
