(psychology) A sense of internal discomfort opposed to pleasure, produced by impeded impulses from the ego.
1999, Joyce Crick, translating Sigmund Freud, The Interpretation of Dreams, Oxford 2008, p. 182:The life of the psyche also has at its disposal wishes whose fulfilment arouses unpleasure – which seems a contradiction, but can be explained if we take into account the presence of the two psychical agencies and the censorship prevailing between them.