thanklessWiktionary 原文英美adj.不感谢的，忘恩的，不知感恩的中文释义来自 ECDICT构词拆解thankthank词干less-less后缀-lessLacking (something); without (something). Added usually to a noun to form an adjective signifying a lack of that noun.词源链中古英语Middle English约 1150–1500 年thankles↓ 继承英语Englishthankless词源说明From Middle English thankles, equivalent to thank + -less.释义形容词adjective1of a taskNot appreciated or rewarded.2of a personUngrateful or unappreciative.同族词派生词 2thanklessly·thanklessness