Meaning

adjective resembling or imitative of or suggestive of a man rather than a woman

adjective characteristic of a man as distinguished from a woman

originFrom Middle English mannish, mannisshe, mannysh, from earlier mennish (“human”), from Old English mennisċ (“human, natural, humane”), from Proto-West Germanic *mannisk, from Proto-Germanic *manniskaz (“human”). By surface analysis, man + -ish. Doublet of mennish, mense, and mensch.

Etymology from Wiktionary, CC BY-SA 3.0