Webster’s Revised Unabridged Dictionary · 1913
Wily
Wil′y (wīl′y̆), a. [Compar. Wilier; superl. Wiliest.] [From Wile.] Full of wiles, tricks, or stratagems; using craft or stratagem to accomplish a purpose; mischievously artful; subtle. "Wily and wise." Chaucer. "The wily snake." Milton.
This false, wily, doubling disposition of mind. South.
Syn. — Cunning; artful; sly; crafty. See Cunning.