n. 助产士；促成因素；产婆（midwife的复数形式）
v. 促成；给…催生；协助达成（midwife的第三人称单数）

Midwife \Mid"wife`\, n.; pl. {Midwives}. [OE. midwif, fr. AS.
mid with (akin to Gr. ?) + ? woman, wife. Properly, the woman
or wife who is attendant upon a woman in childbirth. See
{Meta-}, and {Wife}.]
A woman who assists other women in childbirth; a female
practitioner of the obstetric art.