contingent (adj.)youdaoicibaDictYouDict[contingent 词源字典]
late 14c., from Old French contingent or directly from Latin contingentem (nominative contingens) "happening, touching," present participle of contingere "to touch" (see contact). The noun is from 1540s, "thing happening by chance;" as "a group forming part of a larger group" from 1727.[contingent etymology, contingent origin, 英语词源]