sluggish

寒冷的天气让我的思维变得迟缓。

The cold weather makes my mind feel ___sluggish.

咖啡因能帮助你在早晨感觉不那么迟钝。

Caffeine can help you feel less ___sluggish in the morning.

自从感冒后，我的大脑就变得迟钝，反应也比平时慢。

My mind feels ___sluggish and reacts slower than usual since I caught a cold.