resentment

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Indignation or ill will stemming from a feeling of having been wronged or offended. synonym: anger.

from The Century Dictionary.

• noun The state of feeling or perceiving; strong or clear sensation, feeling, or perception; conviction; impression.
• noun The sense of what is done to one, whether good or evil.
• noun A deep sense of injury; the excitement of passion which proceeds from a sense of wrong offered to one's self or one's kindred or friends; strong displeasure; anger.
• noun Synonyms Vexation, Indignation (see anger), irritation, rankling, grudge, heart-burning, animosity, vindictiveness.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of resenting.
• noun obsolete The state of holding something in the mind as a subject of contemplation, or of being inclined to reflect upon something; a state of consciousness; conviction; feeling; impression.
• noun obsolete In a good sense, satisfaction; gratitude.
• noun In a bad sense, strong displeasure; anger; hostility provoked by a wrong or injury experienced.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A feeling of anger or displeasure stemming from belief that one has been wronged by others or betrayed; indignation.
• noun obsolete The state of holding something in the mind as a subject of contemplation, or of being inclined to reflect upon it; feeling; impression.
• noun obsolete satisfaction; gratitude

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a feeling of deep and bitter anger and ill-will