Careful, prudent, cautious.
The politician gave a canny response to the reporter's questions.
Knowing, shrewd, astute.
The canny lawyer knew just how to get what he wanted.
Frugal, thrifty.
canny investments
Pleasant, fair, favorable or agreeable to deal with.
She's a canny lass hor like!
Gentle, quiet, steady.
a canny horse
Very, considerably; quite, rather.
That's a canny big horse, man!
Gently, quietly; carefully, skilfully.
drive canny
(especially of sound) Sounding as if it is coming through a tin can.