馬ば首しゅばしゅMeanings1nounneck of a horseRefers specifically to the neck of a horse. Often used in classical or literary contexts, such as in the idiom 馬首を回らす (to turn one's horse around).彼かれは馬ば首しゅを回めぐらして、来きた道みちを戻もどった。He turned his horse around and went back the way he came.