ataraxy

1. (philosophy) Ataraxia; freedom from mental disturbance; imperturbability, dogged indifference.Examples: "When the Pyrrhonians say, that ataraxy is the chiefe felicitie, which is the immobilitie of judgement, their meaning is not to speake it affirmatively[…]."; "Youth all around prancing, vociferating, mocking; callow and alien youth, having to be looked after and studied and taught, as though nothing but it mattered, term after term—and now, all of a sudden, in mid-term, peace, ataraxy, a profound and leisured stillness."; "There was no longer any need for fortitude: he felt nothing at present and there was no point in artificial ataraxy."uncountableusually

2. (pharmacology, pharmacy) State of psychological calm and tranquility, absence of discomfort, or metabolical inactivity.Examples: "Ataraxy can be produced by ataractics, drugs that have a calming or quieting effect."uncountableusually