Ataraxia vs. Serenity — What's the Difference?

Ataraxia (Greek: ἀταραξία, from alpha privative ("a-", negation) and tarachē "disturbance, trouble"; hence, "unperturbedness", generally translated as "imperturbability", "equanimity", or "tranquility") is a Greek term first used in Ancient Greek philosophy by Pyrrho and subsequently Epicurus and the Stoics for a lucid state of robust equanimity characterized by ongoing freedom from distress and worry. In non-philosophical usage, the term was used to describe the ideal mental state for soldiers entering battle.Achieving ataraxia is a common goal for Pyrrhonism, Epicureanism, and Stoicism, but the role and value of ataraxia within each philosophy varies in accordance with their philosophical theories.

The state or quality of being serene.

Tranquility of mind; absence of mental disturbance.

The state of being serene; calmness; peacefulness.

Perfect peace of mind, or calmness.

A lack of agitation or disturbance.

Peace of mind

A title given to a reigning prince or similar dignitary.

The quality or state of being serene; clearness and calmness; quietness; stillness; peace.

Calmness of mind; eveness of temper; undisturbed state; coolness; composure.

A disposition free from stress or emotion

The absence of mental stress or anxiety