Sudden
Urgent, Emergency, Steep
adverb, な adjective
This takes its meaning from the sudden part of the kanji, meaning it's sudden, urgent, or an emergency!
This has the same reading as the kanji you learned, meaning you know the reading!
それはとても急な知らせだったので、彼女は驚いた。
It was such sudden news that she was surprised.
急な仕事を引き受けちゃったので、今日のおむかえはおそくなります。
I took an urgent assignment, so I have to pick my kid up later than usual today.
急な依頼ですみません。どうしても断れないお客様からの急ぎの注文だったんです。
Sorry for the sudden request. We had to take an urgent order from the customer we cannot refuse.