unpardonable
abominable
arrant
atrocious
bad
base
black
blamable
blameworthy
criminal
damnable
dark
disgraceful
evil
execrable
flagitious
flagrant
foul
heinous
improper
indefensible
inexcusable
inexpiable
infamous
iniquitous
irremissible
knavish
low
monstrous
naughty
nefarious
peccant
rank
reprehensible
reprobate
scandalous
shameful
sinful
unallowable
unconscionable
unjustifiable
unreasonable
unspeakable
unwarrantable
unworthy
vicious
vile
villainous
wicked
wrong
astound
dastardly
deplorable
egregious
gravest
grievous
grossest
irreparable
sacrilegious
unbelievable
unintentional
unprovoked
unthinkable
venial
forgivable
livable
unlivable