Baretti: A dictionary of the English and Italian languages
Disperá-re, v. n.
1. to despair, to give over for lost; 2. to be given over by the physiciansv. a. to put one out of hopes, to give no hopesv. r. 1. to lose one's patience, to be mad, to be out of one's senses. Deh, perche mi fate —?but why do you teaze me so? 2. to rave like a madman, to be furiously angry; adj. Disperá-nte.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English