ran•klePronunciation: (rang'kul), [key]
—v., -kled, -kling.
(of unpleasant feelings, experiences, etc.) to continue to cause keen irritation or bitter resentment within the mind; fester; be painful.
to cause keen irritation or bitter resentment in: His colleague's harsh criticism rankled him for days.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.