corrupt
crooked
clandestine
crafty
cunning
deceitful
devious
dishonest
dishonorably
duplicitous
fraudulent
furtive
guileful
hangdog
indirect
insidious
oblique
secret
shifty
sly
sneaking
sneaky
tricky
underhanded
unfair
unfairly
wily
Machiavellian
backhand
deft
devel
discreditable
dishonorable
double-handed
high-handed
nefarious
overhand
questionable
surreptitious
treasonable
two-hand
two-handed
unwarrantable
upward
warmup