Milk
Cow's Milk
noun
Cow milk is cow's milk, though most people just call cow's milk milk.
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.
あーっ牛乳こぼれてるよー！
Ahhh, the milk's spilled!
おはよう。はい、牛乳よ。
Good morning. Here’s your milk.
朝日を見ながら飲む美味しい牛乳に勝るものはないね。
There's nothing better than having some good milk to drink while watching the sunrise.