YOU SAID:

gruesome horse is large donkey

INTO JAPANESE

身の毛もよだつ馬は大きなロバです。

BACK INTO ENGLISH

Gruesome horse is big asses.

INTO JAPANESE

身の毛もよだつ馬は大きなお尻であります。

BACK INTO ENGLISH

Gruesome horse is butt.

INTO JAPANESE

身の毛もよだつ馬はお尻です。

BACK INTO ENGLISH

Gruesome horse is butt.