allay

Short definition from Wiktionary

Verb

1. 1
   To make quiet or put at rest; to pacify or appease; to quell; to calm.
2. 2
   To alleviate; to abate; to mitigate.
3. 3
   To subside, abate, become peaceful.
4. 4
   To mix (metals); to mix with a baser metal; to alloy; to deteriorate.
5. 5
   To make worse by the introduction of inferior elements.

Noun

1. 1
   Alleviation; abatement; check.
2. 2
   An alloy.