1. （指持续的令人不快的过程）停止，缓和，减弱
If an unpleasant, continuous process lets up, it stops or becomes less intense.

1. reduce pressure or intensity

e.g. he eased off the gas pedal and the car slowed down

Synonym: ease upease off

2. become less in amount or intensity

e.g. The storm abated
The rain let up after a few hours

Synonym: abateslack offslackdie away