vitalyoudaoicibaDictYouDict[vital 词源字典]
vital: [14] Vital comes via Old French vital from Latin vītālis. This was a derivative of vīta ‘life’. And vīta went back ultimately to Latin vīvus ‘living’, source of English vivacious, vivid, etc. Viable [19] is also descended from vīta, and etymologically means ‘capable of life’.
=> viable, vitamin, vivid[vital etymology, vital origin, 英语词源]
vital (adj.)youdaoicibaDictYouDict
late 14c., "of or manifesting life," from Latin vitalis "of or belonging to life," from vita "life," related to vivere "to live," from PIE root *gweie- (1) "to live" (see bio-). The sense of "necessary or important" is from 1610s, via the notion of "essential to life" (late 15c.). Vital capacity recorded from 1852. Related: Vitally.