set in   (TTS發音)

begin；start 開始

    Before the boat could reach shore， a storm had set in. 小船還未靠岸，暴風雨就來了。

    The rainy season has set in. 雨季開始了。

    He didn't keep the wound clean，so infection set in. 由于沒有保持清潔，傷口開始發炎了。