GROUNDLESS
baseless, groundless, idle, unfounded, unwarranted, wild
(adjective) without a basis in reason or fact; “baseless gossip”; “the allegations proved groundless”; “idle fears”; “unfounded suspicions”; “unwarranted jealousy”
Source: WordNet® 3.1
Etymology
Adjective
groundless (comparative more groundless, superlative most groundless)
Without any grounds to support it; baseless.
Anagrams
• groundsels
Source: Wiktionary
Ground"less, a. Etym: [AS. grundleás bottomless.]
Definition: Without ground or foundation; wanting cause or reason for
support; not authorized; false; as, groundless fear; a groundless
report or assertion.
– Ground"less*ly, adv.
– Ground"less*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition