pertinent (adj.)youdaoicibaDictYouDict[pertinent 词源字典]
late 14c., from Anglo-French purtinaunt (late 13c.), Old French partenant (mid-13c.) and directly from Latin pertinentem (nominative pertinens) "pertaining," present participle of pertinere "to relate, concern" (see pertain). Related: Pertinently.[pertinent etymology, pertinent origin, 英语词源]