Aggression

Aggression
a form of behaviour which leads to self-assertion; it may arise from innate drives and/or a response to frustration; may be manifested by destructive and attacking behaviour, by covert attitudes of hostility and obstructionism, or by healthy self-expressive drive to mastery.
A disposition to behave aggressively.A feeling of hostility that arouses thoughts of attack.Violent action that is hostile and usually unprovoked.The act of initiating hostilities.Deliberately unfriendly behavior.A behavioural occurrence that is used to defend organisms in light of attack or simulate a threat Display in order to fend off the attacker.