maleficent
malicious
acrid
antagonistic
antipathetic
bad
baleful
baneful
belligerent
bitchy
bitter
black
black-hearted
caustic
clashing
colliding
conflicting
corroding
corrosive
corrupting
corruptive
counterproductive
criminal
damaging
deadly
deleterious
despiteful
detrimental
disadvantageous
disserviceable
distressing
envious
evil
evil-disposed
evil-minded
fiendish
full of hate
harmful
hateful
hostile
hurtful
ill
ill-affected
ill-conditioned
ill-disposed
ill-intentioned
malevolence
malevolently
diabolical
implacable
malign
malignant
perverse
sarcastic
sinister
spiteful
unfriendly
vengeful
venomous
vindictive
wicked
benevolent
prevalent
compassionate
kindly