Wis /(?)/

Wis

adv.
  1. Certainly; really; indeed. [Obs.]

Wis

v. t.
  1. To think; to suppose; to imagine; -- used chiefly in the first person sing. present tense, I wis. See the Note under Ywis. [Obs. or Poetic]
    Nor do I know how long it is (For I have lain entranced, I wis).