let_up
1. [ verb ] become less in amount or intensity
Synonyms: die_away slack_off slack abate
Examples:

"The storm abated" "The rain let up after a few hours"

Related terms: decrease letup
2. [ verb ] make less strong or severe
Synonyms: ease_off ease_up
Examples:

"he eased off the gas pedal and the car slowed down"

Related terms: change letup
Similar spelling:   lead_up
  letup