smilelessWiktionary 原文英美构词拆解smilesmile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.词源说明From smile + -less.释义形容词adjective1Without a smile, unsmiling.同族词派生词 2smilelessly·smilelessness