concoction (n.)youdaoicibaDictYouDict[concoction 词源字典]
1530s, "digestion," from Latin concoctionem (nominative concoctio) "digestion," noun of action from past participle stem of concoquere (see concoct). Meaning "preparation of a medicinal potion" is from 1851; sense of "a made-up story" is from 1823.[concoction etymology, concoction origin, 英语词源]
decoction (n.)youdaoicibaDictYouDict
late 14c., from French décoction (13c.) or directly from Latin decoctionem (nominative decoctio) "a boiling down," noun of action from past participle stem of decoquere "to boil down," from de- "down" (see de-) + coquere "to cook" (see cook (n.)).