YOU SAID:

it is very unlikely for the horse to jump

INTO JAPANESE

馬が飛び降りる可能性は非常に低い

BACK INTO ENGLISH

Horses are very unlikely to jump.

INTO JAPANESE

馬が飛び跳ねる可能性は非常に低い。

BACK INTO ENGLISH

It is very unlikely that a horse will jump.

INTO JAPANESE

馬が飛び跳ねる可能性は極めて低い。

BACK INTO ENGLISH

It is extremely unlikely that a horse will jump.

INTO JAPANESE

馬が飛び跳ねる可能性は極めて低い。

BACK INTO ENGLISH

It is extremely unlikely that a horse will jump.