Baretti: A dictionary of the English and Italian languages
As-sicuráre, As-securáre, v. a.
1. to assure, secure, guarantee, preserve from danger; 2. to assure, affirm, certify; 3. to affirm with force or energy; 4. to insure. — la nave, la merce, la casa, &c., to insure a ship, goods, house, &c.;v. r. 1. — d'una cosa, to ascertain a thing;2. to take courage, s. m. As-sicuratóre; adj. As-sicuránte.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English