IPA: /ˈpækˌhɔːrs/
KK: /ˈpækˌhɔrs/
A horse that is used to carry loads or goods, often on a journey or in trade.
The packhorse carried supplies over the mountain for the travelers.
Packhorse → It is formed from "pack" (from Old English *pæcca*, meaning a bundle or load) and "horse" (from Old English *hors*, meaning a horse). A packhorse is a horse used for carrying loads or bundles.
Think of a horse that carries a 'bundle' ('pack') on its back — that's what a packhorse does.