hornus

Uncertain. Possibly from either:

• Proto-Italic *hōrnos, from earlier *hojōrnos, from *ho- (“this”) +‎ *jōros (“year”) +‎ *-nos, medial element from Proto-Indo-European *yóh₁r̥ (“year”), compare hodiē, hodiernus, first part of the formation finds parallel in German heuer, but notably with the determiner declined, cognate with Latin hōra, English year;^[1]
• or perhaps, less likely, ho- +‎ vē̆rnus (“of spring”).

• (Classical Latin) IPA^(key): [ˈhoːr.nʊs]
• (modern Italianate Ecclesiastical) IPA^(key): [ˈɔr.nus]

hōrnus (feminine hōrna, neuter hōrnum); first/second-declension adjective

1. this year's, grown this year

First/second-declension adjective.

• hōrnō (adverb)
• hōrnōtinus

• “hornus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• “hornus”, in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• Pokorny, Julius (1959) Indogermanisches etymologisches Wörterbuch [Indo-European Etymological Dictionary] (in German), volume 1, Bern, München: Francke Verlag, page 297