Baretti: A dictionary of the English and Italian languages
Árdere, v. a. (pass. ar-si, -se, -sero, part. arso),to burn, consume by fire; v. n. to burn, to be inflamed. — d'amore, to burn with love. Ardo di sapere se è vivo o morto, I am impatient to know if he be alive or dead;
2. to be agitated; 3. to burn, emit a great heat; 4. to shine, sparkle, glitter.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English