To Get Cloudy, To Become Cloudy
intransitive verb, godan verb
Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means cloudy and the verb vocab version means to get cloudy or to become cloudy.
くもる
The reading is the same as the one you learned with the kanji. It also happens to be the same as 雲, which has a very similar meaning (clouds).
ラーメンの湯気で眼鏡が曇っちゃうのが好きじゃないんだよね。
I don’t like it when my glasses get cloudy from ramen steam.