ambiguous
equivocal
protective
amoral
bickering
cagey
captious
casuistic
caviling
choplogic
close
closemouthed
conscienceless
corrupt
corrupted
criminal
crooked
cunning
dark
deceitful
devious
discreet
dishonest
dishonorable
dissembling
dodgy
doubtful
dubious
elusive
elusory
equivocating
equivocatory
felonious
fishy
fraudulent
hairsplitting
hedging
ill-got
ill-gotten
immoral
indirect
insidious
intangible
logic-chopping
malingering
misleading
nit-picking
not kosher
oblique
adroit
aloof
cautious
conciliatory
cryptic
diplomatic
furtive
incoherent
mislead
noncommittal
reticent
shy
sly
tactful
tentative
tricky
uncertain
unsatisfactory