anhedonia
noun
an·he·do·nia ˌan-(ˌ)hē-ˈdō-nē-ə 
-nyə
: a psychological condition characterized by inability to experience pleasure in normally pleasurable acts
anhedonic
ˌan-(ˌ)hē-ˈdä-nik
adjective 
Example Sentences
Recent Examples on the Web She was being treated for depression, including different medications, the fourth of which finally helped to address a condition called anhedonia, an inability to experience pleasure. 
Jeff Metcalfe, azcentral, 16 May 2020 But do Carol’s fuguelike depression, Anna’s psychosis and Bonnie’s clenched anhedonia really share DNA? Alexis Soloski, New York Times, 18 Feb. 2020 Another type dampens reward networks, robbing a person of the ability to feel pleasure, a depression symptom called anhedonia. Emily Underwood, Science | AAAS, 20 Aug. 2019 Chronic-pain patients typically also suffer from anhedonia—the inability to experience pleasure—and research suggests that their brains’ reward systems are wired slightly differently from those in other brains. Nicola Twilley, The New Yorker, 9 May 2016 How was the anhedonia hypothesis overturned, and when? Angela Chen, The Verge, 27 Mar. 2018 Nolan has confused his native island with the anhedonia in his head. Christian Lorentzen, New Republic, 25 July 2017 See More
Jeff Metcalfe, azcentral, 16 May 2020 But do Carol’s fuguelike depression, Anna’s psychosis and Bonnie’s clenched anhedonia really share DNA? Alexis Soloski, New York Times, 18 Feb. 2020 Another type dampens reward networks, robbing a person of the ability to feel pleasure, a depression symptom called anhedonia. Emily Underwood, Science | AAAS, 20 Aug. 2019 Chronic-pain patients typically also suffer from anhedonia—the inability to experience pleasure—and research suggests that their brains’ reward systems are wired slightly differently from those in other brains. Nicola Twilley, The New Yorker, 9 May 2016 How was the anhedonia hypothesis overturned, and when? Angela Chen, The Verge, 27 Mar. 2018 Nolan has confused his native island with the anhedonia in his head. Christian Lorentzen, New Republic, 25 July 2017 See More Word History
Etymology
New Latin, from a- entry 2 + Greek hēdonē pleasure — more at hedonism
First Known Use
1887, in the meaning defined above
Medical Definition
anhedonia
noun
an·he·do·nia ˌan-hē-ˈdō-nē-ə
: a psychological condition characterized by inability to experience pleasure in acts which normally produce it compare analgesia