canny (adj.)
- acute
- adroit
- arch
- artful
- astute
- cagey
- calculating
- careful
- cautious
- chary
- cheeseparing
- circumspect
- clever
- crafty
- cunning
- cute
- deceitful
- deep
- deep-laid
- deliberate
- designing
- devious
- dexterous
- diplomatic
- discreet
- economic
- economical
- feline
- forehanded
- foxy
- frugal
- gingerly
- guarded
- guileful
- heedful
- hep
- hesitant
- ingenious
- insidious
- inventive
- judicious
- knowing
- mindful
- noncommittal
- parsimonious
- pawky
- penny-wise
- politic
- provident
- prudent
- prudential
- quick
- quick-witted
- ready
- regardful
- resourceful
- safe
- saving
- scheming
- serpentine
- sharp
- shifty
- shrewd
- slick
- slim
- slippery
- sly
- smart
- smooth
- snaky
- sneaky
- sophistical
- spare
- sparing
- stealthy
- strategic
- subtle
- supple
- tactical
- tentative
- thorough
- thrifty
- tricksy
- tricky
- unadventurous
- uncommunicative
- unenterprising
- vulpine
- wary
- wily