Hatred or hate is a deep and extreme emotional dislike. It can be directed against individuals, groups, entities, objects, behaviors, or ideas. Hatred is often associated with feelings of anger, disgust and a disposition towards hostility.
James W. Underhill, in his Ethnolinguistics and Cultural Concepts: truth, love, hate & war, (2012) discusses the origin and the metaphoric representations of hate in various languages. He stresses that love and hate are social, and culturally constructed. For this reason, hate is historically situated. Although it is fair to say that one single emotion exists in English, French (haine), and German (Hass), hate varies in the forms in which it is manifested. A certain relationless hatred is expressed in the French expression J'ai la haine, which has no equivalent in English. While for English-speakers, loving and hating invariably involve an object, or a person, and therefore, a relationship with something or someone, J'ai la haine (literally, I have hate) precludes the idea of an emotion directed at a person. This is a form of frustration, apathy and animosity which churns within the subject but establishes no relationship with the world, other than an aimless desire for destruction. Underhill (following Philippe Roger) also considers French forms of anti-Americanism as a specific form of cultural resentment.
In psychoanalysis, Sigmund Freud defined hate as an ego state that wishes to destroy the source of its unhappiness. More recently, the Penguin Dictionary of Psychology defines hate as a "deep, enduring, intense emotion expressing animosity, anger, and hostility towards a person, group, or object." Because hatred is believed to be long-lasting, many psychologists consider it to be more of an attitude or disposition than a temporary emotional state.
The neural correlates of hate have been investigated with an fMRI procedure. In this experiment, people had their brains scanned while viewing pictures of people they hated. The results showed increased activity in the middle frontal gyrus, right putamen, bilaterally in the premotor cortex, in the frontal pole, and bilaterally in the medial insular cortex of the human brain.