What does 牛乳 mean?
牛乳 is a Japanese noun meaning “cow's milk” in English. It is written as 牛乳 in kanji, ぎゅうにゅう in hiragana, and gyuunyuu in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
牛は我々に牛乳を与えてくれる。
The cow supplies us with milk.