Webster's Revised Unabridged Dictionary · 1913

Allay

Allay ({not transcribed}) , transitive verb

[Old English alaien, aleggen, to lay down, put down, humble, put an end to, Anglo-Saxon ālecgan; ā- (compare Gothic us-, German er-, orig. meaning out) + lecgan to lay; but confused with old forms of allege, alloy, alegge. See Lay.]

1.
To make quiet or put at rest; to pacify or appease; to quell; to calm; as, to allay popular excitement; to allay the tumult of the passions.
2.
To alleviate; to abate; to mitigate; as, to allay the severity of affliction or the bitterness of adversity.
It would allay the burning quality of that fell poison. — Shakespeare

Allay ({not transcribed}) , transitive verb

To diminish in strength; to abate; to subside.
When the rage allays. — Shakespeare

Allay , noun

Alleviation; abatement; check. [Obsolete]

Allay , noun

Alloy. [Obsolete] — Chaucer

Allay , transitive verb

To mix (metals); to mix with a baser metal; to alloy; to deteriorate. [Archaic] — Fuller