dangerous
unfaithful
unsafe
Machiavellian
Punic
ambidextrous
artful
calculating
chancy
chiseling
collusive
covinous
crafty
crooked
cunning
deceitful
deceptive
desultory
dishonest
disloyal
double
double-crossing
double-dealing
double-faced
double-minded
double-tongued
doublehearted
doubtful
dubious
duplicitous
faithless
false
false-principled
falsehearted
finagling
fraudulent
furtive
guileful
hairy
hazardous
indirect
infirm
insecure
insidious
insubstantial
jeopardous
misleading
perfidious
treacher
treachery
trick
trickster
tricky
barbarous
cowardly
insolent
murderous
nasty
ungrateful
unscrupulous
vile
wicked
lecherous