Identify a characteristic symptom of depression as defined by the DSM-5.

Anhedonia, or the loss of interest or pleasure in activities that were previously enjoyable, is a key characteristic symptom of depression according to the DSM-5. This symptom is central to the diagnosis of major depressive disorder and is a defining feature that differentiates depressive disorders from other mood-related issues.

In clinical practice, anhedonia can manifest in various ways, such as a diminished ability to experience joy in social interactions, hobbies, or sexual activities. It reflects a profound change in the individual's emotional state and engagement with the world, emphasizing the pervasive cognitive and mood disturbances inherent in depression. Identifying anhedonia is crucial for healthcare providers to aid in effective diagnosis and treatment planning. This focus on loss of pleasure strongly aligns with the overarching theme of depression, highlighting its often debilitating impact on an individual's quality of life.