adverbial (adj.)youdaoicibaDictYouDict[adverbial 词源字典]
1610s, "pertaining to adverbs;" earlier it meant "fond of using adverbs" (1590s), from Late Latin adverbialis, from adverbium (see adverb). Related: Adverbially (mid-15c.).[adverbial etymology, adverbial origin, 英语词源]