Baretti: A dictionary of the English and Italian languages
Eccés-so, s. m. Eccés-sività, f.
1. excellence, superiority, elevation, grandeur, pre-eminence. — di mente, elevation of mind. V. estasi; 2. excess, that which is over and above, superfluity;3. exaggeration, amplification, aggravation; 4. crime, sin, transgression, wrong. Dare in eccessi,to commit extravagances, to be guilty of excesses. In —, excessively.
Florio: a worlde of wordes, or most copious, dictionarie in Italian and English
eccesso: excesse, superfluitie, immoderatenesse. Also a surfet, a fault, an excesse.