pertain (v.)youdaoicibaDictYouDict[pertain 词源字典]
early 14c., from Old French partenir "to belong to" and directly from Latin pertinere "to reach, stretch; relate, have reference to; belong, be the right of; be applicable," from per- "through" (see per) + tenere "to hold" (see tenet). Related: Pertained; pertaining.[pertain etymology, pertain origin, 英语词源]