Wild Beast
Wild Animal
noun, の adjective
A field beast/animal is one that lives outside and not under human care. It is a wild beast / wild animal.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
あのカップル、まさに「美女と野獣」って感じだね。
That couple is exactly like the Beauty and the Beast.