slack off

Từ điển WordNet v3.1 - WordNet Dictionary

verb

become less in amount or intensity
- The storm abated
- The rain let up after a few hours
• Syn:
abate, let up, slack, die away
• Derivationally related forms:
letup (for: let up), abatement (for: abate)
• Hypernyms:
decrease, diminish, lessen, fall
• Verb Frames:
- Something ----s