Anger and negative emotions

Aristotle defines fear as "a pain or disturbance due to a mental picture of some destructive or painful evil in the future," and anger as "an impulse, accompanied by pain, to a conspicuous revenge for a conspicuous slight directed without justification towards what concerns oneself or towards what concerns one's friends."..... whats the root for anger? revenge? hatred? frustration? annoyance? hostility? irritation? do they have all have the same root? or are they rooted differently? do they differ only in their degree of the negative energy within? Aristotle seems to indicate that they are, that atleast the anger is, rooted in "unjustified insult", but should insult be an explicit event or can it be a perceived or implicit one?