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effete [effete 词源字典]: effete: [17] Latin effētus meant literally ‘that has given birth’. It was a compound adjective, based on the prefix ex- ‘out’ and fētus ‘childbearing, offspring’ (source of English foetus). Its use spread metaphorically first to ‘worn out by giving birth’ and finally to simply ‘exhausted’, the senses in which English originally acquired it. The word’s modern connotations of ‘overrefinement’ and ‘decadence’ did not develop until the 19th century.
[effete etymology, effete origin, 英语词源]
child-bearing (n.): also childbearing, "bringing forth of a child," late 14c., from child + verbal noun of bear (v.). As an adjective from late 14c.
effete (adj.): 1620s, "functionless as a result of age or exhaustion," from Latin effetus (usually in fem. effeta) "exhausted, unproductive, worn out (with bearing offspring), past bearing," literally "that has given birth," from a lost verb, *efferi, from ex- "out" (see ex-) + fetus "childbearing, offspring" (see fetus). Figurative use is earliest in English; literal use is rare. Sense of "intellectually or morally exhausted" (1790) led to that of "decadent, effeminate" (by 1850s).