cuerno
/ˈkweɾno/ · B2 · noun · m
horn
🐂 cuerno = Latin cornu, horn; same root as corn(er), unicorn, cornet
Cuerno comes from Latin cornu (horn). English kin: unicorn, cornucopia. A croissant is a horn-shaped (crescent) pastry, and cuernos (horns) is a slang for infidelity: the cheated partner is said to wear horns.