Webster's Revised Unabridged Dictionary · 1913

Sooth

Sooth (soth) , a.; also adv.

[Old English soth, Anglo-Saxon sōe, for sane; akin to Old Saxon sōe, Old High German sand, Icelandic sannr, Swedish sann, Danish sand, Sanskrit sat, sant, real, genuine, present, being; properly p. pr. from a root meaning, to be, Sanskrit as, Latin esse; also akin to Gothic sunjis true, Greek 'eteo`s, Sanskrit satya. r9. Compare Absent, Am, Essence, Is, Soothe, Sutee.]

1.
True; faithful; trustworthy. [Obsolete or Scottish]
The sentence [meaning] of it sooth is, out of doubt. — Chaucer
That shall I sooth (said he) to you declare. — Spensser
2.
Pleasing; delightful; sweet. [Rare]
The soothest shepherd that ever piped on plains. — Milton
With jellies soother than the creamy curd. — Keats

Sooth , noun

[Anglo-Saxon sōe. See Sooth, a.]

1.
Truth; reality. [Archaic]
The sooth it this, the cut fell to the knight. — Chaucer
In sooth, I know not why I am so sad. — Shakespeare
In good sooth, Its mystery is love, its meaninng youth. — Longfellow
2.
Augury; prognostication. [Obsolete]
The soothe of birds by beating of their wings. — Spenser
3.
Blandishment; cajolery. [Obsolete] — Shakespeare