\Wis\, adv. [Aphetic form of iwis, ywis; or fr. Icel. viss
certain. See {Ywis}.]
Certainly; really; indeed. [Obs.] ``As wis God helpe me.''
--Chaucer.

\Wis\, v. t. [Due to mistaking OE. iwis certain, AS. gewiss,
for I wis. See {Ywis}.]
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] ``Howe'er you wis.'' --R. Browning.
      Nor do I know how long it is (For I have lain
      entranced, I wis).                       --Coleridge.