Beast, A Beast
noun
The kanji and the word are exactly the same. That means they share meanings as well.
けもの
Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you remember: A beast... what do you think of when you think of a beast? How about a thing (物, もの) full of fur (毛, け), aka a けもの (fur thing)? A beast is a fur thing, and in Japanese that's けもの. Punnnns.
獣がワナにかかったぞ！
The beast was caught in the trap!
森に大きな獣が一匹住んでいる。
A large beast lives in the forest.
あの男の人、獣のような目をしていて、恐いわ。
That guy has eyes like a beast. I’m scared.