iniquitous (adj.)
- abominable
- arrant
- atrocious
- bad
- baleful
- base
- bitchy
- black
- blamable
- blameworthy
- criminal
- cussed
- damnable
- dark
- disgraceful
- evil
- execrable
- felonious
- flagitious
- flagrant
- foul
- harmful
- hateful
- heinous
- illegal
- immoral
- improper
- inequitable
- infamous
- invidious
- knavish
- low
- malefic
- maleficent
- malicious
- malign
- malignant
- mean
- monstrous
- nasty
- naughty
- nefarious
- noxious
- ornery
- peccant
- rank
- reprehensible
- reprobate
- scandalous
- shameful
- sinful
- unbalanced
- undeserved
- undue
- unequal
- uneven
- unforgivable
- unjust
- unlawful
- unmerited
- unpardonable
- unspeakable
- unworthy
- vicious
- vile
- villainous
- wicked
- wrong
- wrongful