Abate

a·bate/əˈbāt/verb

  1. (of something perceived as hostile, threatening, or negative) become less intense or widespread. "the storm suddenly abated"
    • cause to become smaller or less intense."nothing abated his crusading zeal"

    I had to -- as you can tell -- Google this word. I was not familiar with it. I have probably heard of it before but I have personally never used it.

Gabz @Gabz