From Wiktionary, the free dictionary
Probably connected to arzente, variant of ardente (“burning”).[1]
arzillo (feminine arzilla, masculine plural arzilli, feminine plural arzille)
- sprightly
- Synonyms: brioso, vivace
- alert
- (Tuscany, wine) sparkling
- Synonym: frizzante
- ^ “arzillo”, in Vocabolario Treccani on line (in Italian), Istituto dell'Enciclopedia Italiana, 2026
