Webster’s Revised Unabridged Dictionary · 1913
Sooth
Sooth (so͞oth), a.; also adv. [Compar. Soother (so͞oth′ẽr); superl. Soothest.] [OE. soth, AS. sōð, for sanð; akin to OS. sōð, OHG. sand, Icel. sannr, Sw. sann, Dan. sand, Skr. sat, sant, real, genuine, present, being; properly p. pr. from a root meaning, to be, Skr. as, L. esse; also akin to Goth. sunjis true, Gr. ἐτεός, Skr. satya. √9. Cf. Absent, Am, Essence, Is, Soothe, Sutee.] 1. True; faithful; trustworthy. [Obs. or Scot.]
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. [R.]
The soothest shepherd that ever piped on plains. Milton.
With jellies soother than the creamy curd. Keats.
Sooth, n. [AS. sōð. 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. Shak.
In good sooth, Its mystery is love, its meaninng youth. Longfellow.
2. Augury; prognostication. [Obs.]
The soothe of birds by beating of their wings. Spenser.
3. Blandishment; cajolery. [Obs.] Shak.