weak-willedEnglishOxford American Thesaurusweak-willed adjective I was too weak-willed to give up: irresolute, spineless, weak, weak-minded, impressionable, indecisive, doubtful, unassertive, persuadable, persuasible, submissive, compliant, pusillanimous, weak-kneed; informal wimpish, chicken. ▷antonyms strong-willed, resolute.