Anhedonia

In psychology and psychiatry, anhedonia ( /ˌænhiˈdoʊniə/ AN-hee-DOH-nee-ə; Greek: ἀν- an-, "without" + ἡδονή hēdonē, "pleasure") is defined as the inability to experience pleasure from activities usually found enjoyable, e.g. exercise, hobbies, sexual activities or social interactions. While earlier definitions of anhedonia emphasized pleasurable experience, more recent models have highlighted the need to consider different aspects of enjoyable behavior, such as motivation or desire to engage in an activity ("motivational anhedonia"), as compared to the level of enjoyment of the activity itself ("consummatory anhedonia").