heartlessWiktionary 原文中文来自 ECDICTadj.无情的，无勇气的构词拆分heart词根/词干+-less后缀Lacking (something); without (something). Added usually to a noun to form an adjective signifying a lack of that noun.演变路径（由近及远）英语继承自 ←中古英语 hertles继承自 ←古英语 heortlēas “without courage; listless”词源说明From Middle English hertles, herteles, from Old English heortlēas (“without courage; listless”), equivalent to heart + -less. Cognate with German herzlos.释义（英文）形容词 AdjectiveWithout feeling, emotion, or concern for others; uncaring; cruel. [from 16th c.]Without a physical heart. [from 15th c.](now rare) Listless, unenthusiastic. [from 14th c.](obsolete) Without courage; fearful