The phrase "puts up a fight" implies resistance or opposition in the face of a challenge or threat. Antonyms for this phrase may include "gives up easily," "concedes without struggle," "surrenders meekly," or "bows down without a fight." These words suggest a lack of determination or resilience, indicating a person who is easily defeated and lacks the willpower to overcome obstacles. Alternatively, synonyms for "puts up a fight" may include "resists strongly," "fights fervently," "battles tenaciously," or "struggles valiantly," all of which indicate a person who is willing to fight for what they believe in and are determined to succeed despite the odds.