O / oblīvĭōsus
adjective

oblīvĭōsus

fem. oblīvĭōsa · neut. oblīvĭōsum
that easily forgets, forgetful, oblivious
Lit., that easily forgets, forgetful, oblivious (rare but class.): hos (senes) significat credulos, obliviosos, Cic. Sen. 11, 36.—Sup.: homo obliviosissimus, Tert. Anim. 24.—
that produces forgetfulness, oblivious by extension
Transf., that produces forgetfulness, oblivious (poet.): Massicus (i. e. sollicitudinum oblivionem afferens), Hor. C. 2, 7, 21.