bad-tempered
beggarly
big-boned
black-hearted
chickenhearted
dastardly
deep-hidden
half-starved
half-witted
hard-mouthed
humorless
ill-kept
ill-natured
ill-tempered
lowborn
morose
petulant
three-headed
tow-headed
unamiable
uncommunicative
unconscionable
ungrateful
witless