1. hornus — de Vaan
hornus 'grown, produced in this year' [adj. o] (Hor.+) Derivatives: hornd [adv.] 'this year' (P1.+), hornotinus 'of this year's growth' (Cato+). Most scholars assume that hornus is a derivative in *-/«o- of *ho-ior(o)- 'this year', from PIE *(H)ie/oH-r 'year'. Yet the uninfected state of *ho- is Strang: maybe one horreo could posit a loc.sg. *hoiioroi > *hojoroi > *hon9 whence *horino- was derived; but why with a … — [de Vaan, s.v. hornus, p. 303]