'abate' definitions:

Definition of 'abate'

From: WordNet
verb
Make less active or intense [syn: slake, abate, slack]
verb
Become less in amount or intensity; "The storm abated"; "The rain let up after a few hours" [syn: abate, let up, slack off, slack, die away]

Synonyms of 'abate'

From: Moby Thesaurus