subside|subsided|subsiding

她的头痛在吃药后渐渐减轻了。

Her headache began to ___subside after taking the medicine.

随着夜幕降临，城市的噪音逐渐减弱。

The city noise ___subsided as night fell.

由于地下水位下降，这条道路正在逐渐下沉。

The road is slowly ___subsiding because of the dropping groundwater level.