Resentment (also called ranklement) is an emotion of anger or bitterness felt repeatedly, as a result of a real or imagined wrong done.
Professor Robert C. Solomon places resentment on the same line continuum with contempt and anger. According to him, the differences between the three emotions are as follows: resentment is directed towards higher-status individuals, anger is directed towards equal-status individuals and contempt is directed towards lower-status individuals. [1]
Resentment will often manifest itself in the following ways:[2]
* The harbouring of animosity against a person, or group of people, whom the person feels has mistreated them.
* Unresolved anger over a negative event which occurred in the past.
* Seething, aching emotional turmoil felt whenever a certain person or event is discussed.
* The lack of forgiving, the unwillingness to let go and forget.
* A root of distrust and suspicion when dealing with people or events that brought pain in the past.
* Unresolved grief, experienced when finding it difficult to accept a loss.
* A grudge held against a person, or group of people, whom the person feels has kept them from achieving anything.
It can be an emotionally disturbing experience that is being felt again or relived in the mind. When the person feeling resentment is directing the emotion at himself it appears as remorse.
http://en.wikipedia.org/wiki/Resentment