<unk>  () was a term used in psychiatric texts of the late nineteenth and early twentieth centuries. It referred to what was becoming more commonly described as sexual perversion or pathology. It was a term inspired by decadent French fiction, especially the poetry of Charles Baudelaire, and Rachilde.
Morbid love
Obsessive love
Listener fatigue
Tolerated illness
Unipolar emotions
Psychological resistance
Self-hatred
Psychological resilience