Sooth a.; also adv. [Compar. Soother superl. Soothest.]
  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.