Pertinent
来自Big Physics
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late Middle English: from Old French, or from Latin pertinent- ‘having reference to’, from the verb pertinere (see pertain).
wiktionary
Borrowed from French pertinent, from Latin pertinens, present participle of pertinere(“to extend, stretch out, belong, relate, pertain, have concern”), from per(“through”) + tenere(“to hold”).
etymonline
pertinent (adj.)
belonging or relating to the subject or matter in hand," "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.
