a.

1. 不高興的，繃著臉的；慍怒的
   Susan was sullen in the morning because she hadn't slept well.

   蘇珊今天早上鬱悶不樂，因為昨晚沒睡好。

2. 乖戾的
3. （天氣）陰沉的
   This sullen weather disagrees with me.

   遇上這種陰沉的天氣我就感到不舒服。

4. （聲音，顏色等）沉悶的
   The blue eyes were reddened and sullen with weeping.

   一對碧眼哭得發紅，沒了光輝。

5. （水流）停滯的
   A sullen stream winds its way among the trees.

   一條水流滯緩的小溪蜿蜒流經樹林。

adj.