Cause

[Sarah]

A suit or action in court; any legal process by which a partyendeavors to obtain his claim, or what he regards as his right; case;ground of action.

[Sarah]

1.slang for [because]
2.the word someone types when they're too lazy to write because.

[Dianne]

[Anhedonia] is closely linked to depression, but you dont have to be depressed or feel sad to have it. It also affects people with other mental illnesses, like schizophrenia and bipolar disorder. And it can show up in people with seemingly unrelated health concerns like Parkinsons disease, diabetes, [coronary artery] disease, and substance abuse issues.
Scientists think [anhedonia] may be tied to changes in brain activity. You might have a problem with the way your brain produces or responds to dopamine, a feel-good mood chemical. Some early research (on rats) suggests that the dopamine neurons in an area of the brain called the prefrontal cortex might be overactive in people with anhedonia. This somehow interferes with pathways that control how we seek out rewards and experience them