1) Acrimonious 2) Aggrieved 3) Bitter 4) Disagreeable 5) Disillusioned 6) Envious 7) Jealous 8) Morose 9) Rancorous 10) Reluctant 11) Sore 12) Unforgiving 1) Acrimonious 2) Angry 3) Bitter 4) Cynical 5) Embittered 6) Feeling ill will 7) Hard done-by 8) Indignant 9) Like Cain, toward Abel 10) Rancorous 11) Sulky 
• (a.) Inclined to resent; easily provoked to anger; irritable.
Re·sent'ful adjective Inclined to resent; easily provoked to anger; irritable. -- 
[adj] - full of or marked by resentment or indignant ill will
resentful Full of deep hostility due to a real or imagined offense; acrimonious.
adjective full of or marked by resentment or indignant ill will; `resentful at the way he was treated`; `a sullen resentful attitude`
full of or marked by indignant ill will