Ywis

““Ywis,” quod he, “it is full dear, I say.”” — Chaucer.

“She answered me, “I-wisse, all their sport in the park is but a shadow to that pleasure that I find in Plato.”” — Ascham.

“A right good knight, and true of word ywis.” — Spenser.

“Our ship, I wis, Shall be of another form than this.” — Longfellow.