“+ adjective
Etymology: un- (I) + founded, past participle of found
1. obsolete : bottomless , unstable
the unfounded deep — John Milton
2. : lacking a sound basis in reason or fact : baseless , groundless , illusive
an unfounded accusation
unfounded suspicions
his … rash and most unfounded assertion — J.M.Kemble
that hope proved to be unfounded — Edith Sitwell