Midwife
来自Big Physics
Middle English: probably from the obsolete preposition mid ‘with’ + wife (in the archaic sense ‘woman’), expressing the sense ‘a woman who is with (the mother’).
wiktionary
From Old English midwīf, corresponding to mid(“with”) + wīf(“woman”). It appears not to be entirely clear whether the original understanding was “with-woman” in the sense of “attending/assisting woman”, or “they who are with the woman” (namely the mother).
etymonline
midwife (n.)
"a woman who assists women in childbirth," c. 1300, literally "woman who is 'with' " (the mother at birth), from Middle English mid "with" (see mid (prep.)) + wif "woman" (see wife). Cognate with German Beifrau.