primordial (adj.)youdaoicibaDictYouDict[primordial 词源字典]
late 14c., from Late Latin primordialis "first of all, original," from Latin primordium "a beginning, the beginning, origin, commencement," from primus "first" (see prime (adj.)) + stem of ordiri "to begin" (see order (n.)). Related: Primordially.[primordial etymology, primordial origin, 英语词源]