YOU SAID:

dont force a horse across water

INTO JAPANESE

馬に水を無理やり渡らせないでください

BACK INTO ENGLISH

Do not force horses to cross water

INTO JAPANESE

馬に水を渡らせるな

BACK INTO ENGLISH

don't let the horse pass the water

INTO JAPANESE

馬に水を渡させないでください

BACK INTO ENGLISH

don't let the horse pass the water