To you quite common I think. To me a new surprising word I just came across.

wile, wilier, wiliest, wilishness

Wile
1154, "wile, trick," perhaps from O.N.Fr. *wile (O.Fr. guile), or directly from a Scand. source (cf. O.N. vel "trick, craft, fraud," vela "defraud"). Perhaps ultimately related to O.E. wicca "wizard" (see Wicca). Lighter sense of "amorous or playful trick" is from 1600. Wily is attested from c.1300. (online Etym.)