n.

1. 抱怨；抗議；怨言；抱怨的緣由[C][U][（+about/over/against）]
   There is no real reason for complaint.

   沒有什麼可抱怨的理由。

2. 【律】控告；控訴[C][（+against/with）]
   The storekeeper signed a complaint accusing them of shoplifting.

   店主簽署了控告書，指控他們在店裡扒竊貨物。

3. 疾病，身體不適[C]
   Arthritis is a common complaint among the elderly.

   關節炎是老年人的一種常見病。

n.

1. an act or the action of complaining.
   ▸a reason for dissatisfaction.
   ▸Law  the plaintiff's reasons for proceeding in a civil action.
2. an illness or medical condition, especially a minor one.