To Fry, To Stir-Fry, To Sauté
transitive verb, ichidan verb
This is the verb version of the kanji fry, so it means to fry, more specifically to stir-fry or to sauté.
いためる
Since this word has okurigana (hiragana attached to the kanji) you know that it's probably going to be the kun'yomi reading. You learned this reading with the kanji, so you should be good to go!
三十分もかけて玉ねぎを炒めるんですか？
Do you really spend thirty minutes sautéing the onions?
炒めすぎないように気をつけてくださいね。
Be careful not to overcook them, okay?
強火で手早く炒めていきましょう。
Let's quickly stir-fry over high heat.