adjective
being without cause or occasion
anxious old ladies with their baseless fears
Synonyms: bottomless, foundationless, gratuitous, groundless, uncalled-for, unfounded, ungrounded, unwarranted
Related Word: false, wrong; indefensible, reasonless, unjustifiable, unsolid, unsupported, unsustained, untenable; empty, idle, vain; needless, pointless, senseless, unnecessary, unneeded
Contrasted words: actual, real, reasonable, true; authentic, bona fide, genuine, valid