Allays

verb

1. To make quiet or put at rest; to pacify or appease; to quell; to calm.

   "to allay popular excitement"

2. To alleviate; to abate; to mitigate.

   "to allay the severity of affliction or the bitterness of adversity"

3. To subside, abate, become peaceful.
4. To mix (metals); to mix with a baser metal; to alloy; to deteriorate.
5. (by extension) To make worse by the introduction of inferior elements.