Webster's Revised Unabridged Dictionary · 1913

Soothe

Soothe (sot) , transitive verb

[Originally, to assent to as true; Old English soeien to verify, Anglo-Saxon gesōeian to prove the truth of, to bear witness. See Sooth, a.]

1.
To assent to as true. [Obsolete] — Testament of Love
2.
To assent to; to comply with; to gratify; to humor by compliance; to please with blandishments or soft words; to flatter.
Good, my lord, soothe him, let him take the fellow. — Shakespeare
I've tried the force of every reason on him, Soothed and caressed, been angry, soothed again. — Addison
3.
To assuage; to mollify; to calm; to comfort; as, to soothe a crying child; to soothe one's sorrows.
Music hath charms to soothe the savage breast, To soften rocks, or bend a knotted oak. — Congreve
Though the sound of Fame May for a moment soothe, it can not slake The fever of vain longing. — Byron