veterinus

Etymology
Probably from, formed at a time when was still a substantive meaning year (compare 🇨🇬). De Vaan invokes Adams's observation that refers to horses in particular and were thus seen as "the old stock", due to horses living longer than other domesticated cattle-type animals. Morphologically less likely, but semantically better is a connexion to.

Adjective

 * 1) related to carrying or drawing burdens
 * 2) related to beasts of burden

Usage notes

 * Can be substantivized as veterīnum (sc. animal) or veterīna (sc. bēstia). Synonymous is jūmentum.