subjacent (adj.)youdaoicibaDictYouDict[subjacent 词源字典]
1590s, from Latin subiacentem (nominative subiacens) "lying beneath," present participle of subiacere "to lie underneath, lie near, adjoin," from sub- "under," also "close to" (see sub-) + iacere "to throw" (see jet (v.)).[subjacent etymology, subjacent origin, 英语词源]