Janus-faced
ambidextrous
beguiling
black
blackguardly
debasing
deceitful
deceptive
degrading
disgraceful
double-dealing
double-faced
double-tongued
duplicitous
fallacious
false
fraudulent
ignominious
inglorious
misleading
opprobrious
picaresque
rascally
roguish
scoundrelly
shabby
shameful
shoddy
thieving
thievish
two-faced
unprincipled
yellow
amoral
bad
base
conscienceless
contemptible
corrupt
corrupted
criminal
crooked
dark
debased
derogatory
despicable
devious
dirty
discreditable
disesteemed
dishonest
disloyal
disreputable
doubtful
dubious
evasive
evil
faithless
felonious
filthy
fishy
flagrant
foul
heinous
hypocritical
ignoble
ill-got
ill-gotten
immoral
improper
indirect
infamous
insidious
low
mean
cowardly
dishonourable
impolitic
nefarious
reprehensible
sinful
undignified
unethical
ungentlemanly
unlawful
unscrupulous
honorable