extreme pride or overconfidence, often in combination with arrogance
Hubris (, from ancient Greek ὕβρις) describes a personality quality of extreme or foolish pride or dangerous overconfidence, often in combination with (or synonymous with) arrogance. "Arrogance" comes from the Latin adrogare and it means the feeling a right to demand certain attitudes and behaviors from other people, "pretension" which is also associated with it is not synonymous to hubris. According to studies, hubris, arrogance and pretension are related to the need for victory (even if it doesn't always mean winning) instead of reconciliation, as would be made by "friendly" groups. Hubris is usually perceived as a characteristic of an individual rather than a group, although the group the offender belongs to may suffer collateral consequences from the wrongful act. Hubris often indicates a loss of contact with reality and an overestimation of one's own competence, accomplishments or capabilities. The adjectival form of the noun hubris is "hubristic".
The term hubris originated in ancient Greek, where it had several different meanings depending on the context, in legal usage it meant assault or sexual crimes and theft of public property, and in religious usage it meant transgression against god.
Read more or edit on Wikipedia