sullen [ˈsʌlən]

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adj.愠怒的，闷闷不乐的，(天气等)阴沉的

angry and unwilling to smile or be pleasant to people

He looked up at the sullen sky. 他抬头看了一眼阴沉的天空。
Susan was sullen in the morning because she hadn't slept well. 苏珊今天早上郁闷不乐, 因为昨晚没睡好。