Sentence examples for a warrior from inspiring English sources

The phrase "a warrior" is correct and usable in written English.
It can be used to refer to a person who is engaged in warfare or a person who shows great courage and determination in facing challenges.
Example: "In the face of adversity, she proved herself to be a true warrior, fighting for her beliefs and standing up for what is right."
Alternatives: "a fighter" or "a champion".