darken
🇺🇸
/ˈdɑːrkən/
🇬🇧
/ˈdɑːkən/
to become dark or make something dark
The sky began to darken as the storm approached.
随着暴风雨的临近,天空开始变暗。
to become unhappy or angry, or make someone unhappy or angry
His expression started to darken when he heard the bad news.
当他听到这个坏消息时,他的表情开始变得阴沉。