What does it mean to dream about resentment?
Resentment in a dream often holds a grievance that has not been let go, and who or what it settled on is usually worth weighing against waking life.
Four ways to read it
Each reading below comes from a named tradition and a cited source, so you can see where it came from and decide what fits your dream.
Freud
Freud would read resentment as anger that could not be spoken and has turned inward over time, a hostility kept down. He held that such stored feeling can surface in sleep when the day allows it no outlet. The bitterness may mark a wrong the self has not been able to release.
After Freud, The Interpretation of Dreams (Brill trans., 1913), public domain.Jung
Jung would see resentment as energy bound to an old injury, the psyche circling a wound it has not been able to heal. He treated such bitterness as a weight that asks to be set down for the self's own sake. The grudge can mark where forgiveness or release is needed.
Jungian concept (our summary).Modern
Continuity research ties dream resentment to waking grievances the mind keeps turning over, the slights and wrongs that have not settled. Some accounts suggest dreaming returns to unfinished feeling. The bitterness is best read against what you are still holding against someone.
Continuity hypothesis (our summary).Mythological
Myth carried long grudges with great consequence, the slighted goddess whose anger shaped a war, the curse passed down a house. Resentment nursed across years brought ruin in its wake. Across cultures such tales weighed the cost of a wrong that would not be released.
Rosmerta Publishing editorial synthesis (after Bulfinch; Brewer).