femaleyoudaoicibaDictYouDict[female 词源字典]
female: [14] The symmetry between female and male is a comparatively recent development. Female started as Latin fēmella, a diminutive form of fēmina ‘woman’ (whence English feminine [14]). This in turn was a derivative of Latin fēlāre ‘suck’, and so etymologically signified ‘person from whom milk is sucked’ (it came ultimately from the Indo-European base *dhēi-, which also produced Latin filia ‘daughter’ and filia ‘son’, source of English filial [15]). Fēmella passed into English via Old French femelle as femele, but as early as the end of the 14th century began to change, by association with male, to female.
=> feminine, filial[female etymology, female origin, 英语词源]
female (n.)youdaoicibaDictYouDict
early 14c., from Old French femelle "woman, female" (12c.), from Medieval Latin femella "a female," from Latin femella "young female, girl," diminutive of femina "woman" (see feminine).
WHEN the Himalayan peasant meets the he-bear in his pride,
He shouts to scare the monster, who will often turn aside.
But the she-bear thus accosted rends the peasant tooth and nail.
For the female of the species is more deadly than the male.

[Kipling]
Sense extended in Vulgar Latin from young humans to female of other animals, then to females generally. Compare Latin masculus, also a diminutive (see masculine). Spelling altered late 14c. in erroneous imitation of male. In modern use usually as an adjective (early 14c.). Reference to implements with sockets and corresponding parts is from 1660s.