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Webster 1913 Edition

Noun.

An allaying; that which allays; mitigation.

[Obs.]

The like

allayment

could I give my grief.

Shakespeare

Noun.

The act of quieting, or a state of tranquility; a state of rest after disturbance; abatement; ease; as, the allayment of grief.

allayment ‎(plural allayments)