vital
adj.
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.
〔蒋〕[vit生命，-al形容词后缀，…的] 生命的，有生命的，充满活力的，致命的，生命攸关的
〔李〕[vit=life生命；-al a.=pertaining to……的→] a.① pertaining to life or necessary for life 生命的；生命攸关的