Old English mannian "to furnish (a fort, ship, etc.) with a company of men," from man (n.). Meaning "to take up a designated position on a ship" is first recorded 1690s. Meaning "behave like a man, act with courage" is from c. 1400. To man (something) out is from 1660s. Related: Manned; manning.[man etymology, man origin, 英语词源]