Adverb
I wis (comparative more I wis, superlative most I wis)
assuredly, truly, indeed
I wis, your grandam had a worser match — Shakespeare.
Something you see in me I wis not: Another heart in you I guess: A stranger's lips - but thine I kiss not, Erring in all my tenderness. George William Russell
And I no other fancy have but this, To 'scape from servitude and poverty; Naught else in all the world is bad, I wis. Marco Guazzo