Webster's Revised Unabridged Dictionary · 1913

Assuage

Assuage ({not transcribed}) , transitive verb

[Old English asuagen, aswagen, Old French asoagier, asuagier, from assouagier, from Latin ad + suavis sweet. See Sweet.]

To soften, in a figurative sense; to allay, mitigate, ease, or lessen, as heat, pain, or grief; to appease or pacify, as passion or tumult; to satisfy, as appetite or desire.
Refreshing winds the summer's heat assuage. — Addison
To assuage the sorrows of a desolate old man — Burke
The fount at which the panting mind assuages Her thirst of knowledge. — Byron

Assuage , intransitive verb

To abate or subside. [Archaic]
The waters assuaged. — Gen. vii. 1
The plague being come to a crisis, its fury began to assuage. — De Foe