<unk>  typically refers to the thoughts, feelings, and behaviors that occur when a person believes a valued relationship is being threatened by a rival. This rival may or may not know that he or she is perceived as a threat.
According to many authors,<unk>  is a complex emotion, meaning that it is not possible to provide a simple and immediate description of it, as it would be for “basic” emotions like joy or anger. A definition that expresses this character of complexity is “a cognitive elaboration of basic emotions” (Prinz, 2004, p. 93). This means that the experience of<unk>  as felt by humans appears to be not merely sensory, showing some characters of rational elaboration and instinct. In addition, it is a common fact that the experience of<unk>  can last much longer than the one of a basic emotion like anger, without losing its original intensity.
Jealousy
Disgust
Disappointment
Emotional detachment
Unconsciousness
Blunted affect
Intrusive thoughts
Hallucination