Ill.

例句：

1. 1. He was feeling under the weather when he arrived at the hospital.
   他到达医院时感到身体不适。
2. 2. The doctor prescribed a course of antibiotics to treat his illness.
   医生开了一剂抗生素来治疗他的病。
3. 3. She had been suffering from insomnia for several nights.
   她连续几个晚上都失眠了。