YWIS adv.
Certainly; most likely; truly; probably. [Obs. or Archaic] "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.
Z n.
from the Greek alphabet, this having it from a Semitic source. The ultimate origin is probably Egyptian. Etymologically, it is most closely related to s, y, and j; as in glass, glaze; E. yoke, Gr. yugum; E. zealous, jealous. See Guide to Pronunciation, §§ 273, 274.