Hatred

thumb|344x344px|A man glowering, expressing hatred or jealousy.

thumbnail|Duel between two enemies; here, the characters of Eugene Onegin and Vladimir Lensky from the novel, [[Eugene Onegin.]] An enemy or a foe is an individual or a group that is considered as forcefully adverse or threatening. The concept of an enemy has been observed to be "basic for both individuals and communities". The term "enemy" serves the social function of designating a particular entity as a threat, thereby invoking an intense emotional response to that entity. The state of being or having an enemy is enmity, foehood or foeship.

thumb|Engraving depicting the play Le Misanthrope by [[Molière]]

Resentment (also called ranklement or bitterness) is a complex, multilayered emotion that has been described as a mixture of disappointment, disgust and anger. Other psychologists consider it a mood or as a secondary emotion (including cognitive elements) that can be elicited in the face of insult or injury.

In philosophy, ressentiment (; ) is one of the forms of resentment or hostility. The concept was of particular interest to some 19th-century thinkers, most notably Friedrich Nietzsche. According to their use, ressentiment is a sense of hostility directed toward an object that one identifies as the cause of one's frustration, that is, an assignment of blame for one's frustration. The sense of weakness or inferiority complex and perhaps even jealousy in the face of the "cause" generates a rejecting/justifying value system, or morality, which attacks or denies the perceived source of one's frustr

Self-hatred is a state of personal self-loathing or low self-esteem.

intentionally harming others without self-benefit

relationship involving simultaneous or alternating emotions of love and hate

A hater, anti-fan, toxic fan, detractor or anti is someone who enjoys writing, discussing, or (in some cases) making derivative works about a piece of media, but solely for the purpose of railing against or parodying it. It can also be a person with hatred towards a celebrity or icon. Haters often attract other haters to create a negative community. They are at odds with the fans. Someone who opposes a ship (a romantic pairing between two characters) is called an anti-shipper.