agrio.

Etymology tree Proto-Indo-European *h₂eḱ- Proto-Indo-European *-rós Proto-Indo-European *h₂eḱrós Proto-Italic *akris Classical Latin ācer Late Latin ācrus Old Spanish agro Early Modern Spanish agro ▲ Spanish agriarinflu. Spanish agrio According to Coromines and Pascual, first attested in the 16th century. From Early Modern Spanish agro (used until the 17th century), from Old Spanish agro, from Late Latin ācrus, from Classical Latin ācer (“sharp, piercing, pungent”). The ending -io is due to influence from the verb agriar (“to sour”), or alternatively from a Vulgar Latin *acridus. Coromines and Pascual say that although agriar is not attested until the 18th century, they nevertheless suspect it may have existed much earlier. Related to Old Spanish agrión (“berro”), Mozarabic *aqriyûn (perhaps read *aqriyûl or *uqurión), and Occitan agriota. Cognate with Old French aigre, Italian agro, and Romanian acru.

Etymology tree Proto-Indo-European *h₂eḱ- Proto-Indo-European *-rós Proto-Indo-European *h₂eḱrós Proto-Italic *akris Classical Latin ācer Late Latin ācrus Old Spanish agro Early Modern Spanish agro ▲ Spanish agriarinflu. Spanish agrio According to Coromines and Pascual, first attested in the 16th century. From Early Modern Spanish agro (used until the 17th century), from Old Spanish agro, from Late Latin ācrus, from Classical Latin ācer (“sharp, piercing, pungent”). The ending -io is due to influence from the verb agriar (“to sour”), or alternatively from a Vulgar Latin *acridus. Coromines and Pascual say that although agriar is not attested until the 18th century, they nevertheless suspect it may have existed much earlier. Related to Old Spanish agrión (“berro”), Mozarabic *aqriyûn (perhaps read *aqriyûl or *uqurión), and Occitan agriota. Cognate with Old French aigre, Italian agro, and Romanian acru.