warrior
n.-
1 a soldier or fighter (n.) B1 Intermediatea person who fights in a war or battle, especially in the past.
a person engaged in or experienced in warfare; often implies a historical, tribal, or heroic context rather than a modern professional soldier.
ExampleThe ancient stories tell of a brave warrior who protected his village from invaders.
ExampleHistorical accounts describe the samurai not just as skilled warriors, but as a distinct social class with a strict code of honour.
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2 someone who works hard for a cause (n.) B2 Upper Intermediatea person who shows great courage or energy while dealing with a difficult situation or fighting for a goal.
a person who shows great vigour, courage, or persistence in a non-military struggle, such as social justice or sports.
ExampleShe is a true social justice warrior who spends all her time helping the homeless.
ExampleThe coach praised the young athlete as a warrior on the court, noting her refusal to give up even when the team was losing.
From Middle English werreour, from Anglo-Norman werreur, Old French guerroiier (“fighter, combattant”), from Medieval Latin werra, from Frankish werru (“confusion; quarrel”), from Proto-Indo-European wers- (“to mix up, confuse, beat, thresh”). Displaced native Old English cempa and many others.