- groundless (adj.)
[groundless 词源字典]
- 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.[groundless etymology, groundless origin, 英语词源]