noun
horse breeder; person who raises horses
Refers to someone whose occupation or role is raising and caring for horses.
彼は馬飼いとして牧場で働いている。
He works on a ranch as a horse breeder.
Compound of 馬 (uma, 'horse') and 飼い (kai, 'raising/keeping'), the nominalized form of 飼う (kau, 'to raise/keep').