can·ny 
(kănē)
(kănē)adj. can·ni·er, can·ni·est
1. Careful and shrewd, especially where one's own interests are concerned.
2. Cautious in spending money; frugal.
3. Scots
a. Steady, restrained, and gentle.
b. Snug and quiet.
[From CAN1.]
canni·ly adv.
canni·ness n.