groundlessadj.
英 'graʊn(d)lɪs | 美 'ɡraʊndləs
中文adj. 无理由的
词根词源
groundless (adj.)Old English grundleas "bottomless, unfathomable, vast;" see ground (n.) + -less. Figurative sense of "having no adequate cause or reason" is from 1620s. Similar formation in Dutch grondeloos, German grundlos, Old Norse grunnlauss. Related: Groundlessly; groundlessness.
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