1.
[syn: baseless, groundless, idle, unfounded, unwarranted, wild]
The Collaborative International Dictionary of English v.0.48:
Groundless \Ground"less\, a. [AS. grundle['a]s bottomless.]
Without ground or foundation; wanting cause or reason for
support; not authorized; false; baseless; as, groundless
fear; a groundless report, rumor, or assertion. --
Ground"less*ly, adv. -- Ground"less*ness, n.
WordNet (r) 3.0 (2006):
groundless
adj 1: without a basis in reason or fact; "baseless gossip";
"the allegations proved groundless"; "idle fears";
"unfounded suspicions"; "unwarranted jealousy" [syn:
baseless, groundless, idle, unfounded,
unwarranted, wild]