man [Middle English, from Old English mann]

"Usage Note: Traditionally, many writers have used man and words derived from it to designate any or all of the human race regardless of sex. In fact, this is the oldest use of the word. In Old English the principal sense of man was “a human,” and the words wer and wyf (or wæpman and wifman) were used to refer to “a male human” and “a female human” respectively. But in Middle English man displaced wer as the term for “a male human,” while wyfman (which evolved into present-day woman) was retained for “a female human.” Despite this change, man continued to carry its original sense of “a human” as well, resulting in an asymmetrical arrangement that many criticize as sexist." (Emphasis added.)