The term "most unmanlike" is an adjective used to describe behavior that goes against traditional masculine traits. Some antonyms for "most unmanlike" could include "manly," "masculine," "gallant," "chivalrous," or "brave." These words imply a sense of strength, courage, and honor, which are often associated with masculinity. Other antonyms might include "weak," "timid," "feeble," "cowardly," or "spineless," which all suggest a lack of strength or bravery. It's important to note that while these words may be seen as antonyms of "most unmanlike," gender stereotypes and traditional notions of masculinity are constantly evolving, and individuals should not be limited by societal expectations.