tricky (adj.)

• abstruse
• acute
• ambidextrous
• arch
• arduous
• artful
• astute
• awkward
• beguiling
• brutal
• cagey
• calculating
• canny
• catchy
• cheating
• clever
• collusive
• complex
• complicated
• conscienceless
• corrupt
• corrupted
• crafty
• criminal
• critical
• crooked
• cunning
• cute
• dark
• debatable
• deceitful
• deceiving
• deceptive
• deep
• deep-laid
• delicate
• delusive
• delusory
• demanding
• designing
• devious
• difficult
• diplomatic
• dishonest
• dishonorable
• double
• double-dealing
• doubtful
• dubious
• duplicitous
• evasive
• exacting
• fallacious
• false
• feline
• felonious
• fishy
• formidable
• foxy
• fraudulent
• furtive
• guileful
• hairy
• hallucinatory
• hard
• hard-fought
• hazardous
• iffy
• ill-gotten
• illusive
• illusory
• immoral
• indirect
• ingenious
• insidious
• intricate
• inventive
• knotted
• knotty
• knowing
• laborious
• mean
• misleading
• operose
• pawky
• perfidious
• playful
• politic
• prankish
• precarious
• questionable
• quirky
• ready
• resourceful
• rigorous
• risky
• rocky
• roguish
• rotten
• rough
• rugged
• scheming
• sensitive
• serpentine
• severe
• shady
• shameless
• sharp
• shifty
• shrewd
• sinister
• slick
• slippery
• sly
• smooth
• snaky
• sneaky
• sophistical
• spiny
• sportive
• stealthy
• steep
• sticky
• strategic
• strenuous
• subtle
• supple
• surreptitious
• suspicious
• tactical
• thorny
• ticklish
• toilsome
• touch-and-go
• touchy
• tough
• treacherous
• tricksy
• two-faced
• uncertain
• unconscientious
• unconscionable
• undependable
• underhand
• underhanded
• unethical
• unfair
• unjust
• unprincipled
• unsavory
• unscrupulous
• unsportsmanlike
• uphill
• vulpine
• waggish
• wary
• wicked
• wily