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. “Howe'er you wis.” R. Browning.
Nor do I know how long it is
(For I have lain entranced, I wis). Coleridge.