let up

(noun) a pause during which things are calm or activities are diminished. Synonyms: letup, lull. Example: "There was never a letup in the noise."

(verb) become less in amount or intensity. Synonyms: abate, let up, slack off, slack, die away. Examples: "The storm abated." "The rain let up after a few hours."

(verb) reduce pressure or intensity. Synonyms: ease up, ease off, let up. Example: "He eased off the gas pedal and the car slowed down."