inflection (n.)youdaoicibaDictYouDict[inflection 词源字典]
early 15c., from Middle French inflexion and directly from Latin inflexionem (nominative inflexio) "a bending, inflection, modification," noun of action from past participle stem of inflectere (see inflect). For spelling, see connection. Grammatical sense is from 1660s.[inflection etymology, inflection origin, 英语词源]