unneedfulWiktionary 原文英美构词拆解unun-前缀needfulneedful词干un-(added to adjectives or past participles) not · (added to nouns) lack of词源链中古英语Middle English约 1150–1500 年unnedeful↓ 继承英语Englishunneedful词源说明From Middle English unnedeful; equivalent to un- + needful.释义形容词adjective1Not needful.同族词派生词 2unneedfully·unneedfulness