dementio

dēmentĭo, īre, 4, v. n. [id.], to be out of one's senses, to be mad, to rave (anteand post-class.): dementit deliraque fatur, * Lucr. 3, 464:

sese mea magia in amorem inductam dementire,

App. Mag. p. 324, 9:

aliquis instinctu daemonis percitus dementit, effertur, insanit,

Lact. 4, 27 med.