ETYMOLOGY
from Latin vafer, vafr- (sly, cunning, crafty) + -ous
EXAMPLE
“…thinkyng surely that they for the most part, would neuer cosent & longe agree with the Englishmen, accordyng to their olde vaffrous varietie: wherfore least ye he should offend or ministre cause of occasio to them (as in dede all me were not his frendes in Scotlad at that tyme) he desired y Ambassadours to cosent w truce & abstinece of warre for suen yeres…”
From: The Vnion of the Two Noble and Illustre Famelies of Lancastre [and] Yorke
By Edward Hall, 1548
Lexicophilia 