Etymology First attested in 1628; borrowed from Latin dēmentātus, perfect passive participle of dēmentō, see -ate (verb-forming suffix) and -ate (adjective-forming suffix).
as if they had all […] landed in the mad haven in the Euxine Sea of Daphne insana, which had a secret quality to dementate […]., New York, 2001, p.117
dementate
adj
Etymology First attested in 1628; borrowed from Latin dēmentātus, perfect passive participle of dēmentō, see -ate (verb-forming suffix) and -ate (adjective-forming suffix).