ill-natured
angry
bad-tempered
bearish
bilious
cankered
cantankerous
churlish
crabbed
cranky
cross
crusty
currish
cynic
cynical
dogged
doggish
dorty
dyspeptic
fractious
frumpish
frumpy
grouchy
grouty
grum
grumpish
grumpy
hot-tempered
huffy
ill-conditioned
ill-humored
irritable
malignant
morose
nasty
peevish
petulant
querulous
rusty
shrewd
shrewish
snappish
snarly
sour
captious
discontented
insubordinate
overbear
quarrelsome
resentful
restive
spiteful
sulky
ungrateful
unkind
wayward
affable
agreeable