when a person is stiff, their muscles hurt when they move them 僵硬的；一动就疼的
I’m really stiff after that bike ride yesterday.
昨天骑了那趟自行车，我觉得浑身酸痛。
I’ve got a stiff neck.
我脖子发僵。
(of a person or their behaviour 人或行为) not friendly or relaxed 不友好的；生硬的
The speech he made to welcome them was stiff and formal.
他那番欢迎他们的话讲得生硬刻板。