ˈ ̷ ̷ˌ ̷ ̷ noun
1. : a horse used chiefly for labor as distinguished from driving, riding, or racing
2.
a. : a person who undertakes arduous labor
b. : a markedly useful or durable vehicle, craft, or machine
helicopter today … is the workhorse of the air — W.O.Murphy
3. : sawhorse , trestle 1a