Eudaimonia
Aristotle's term for the highest human good, usually translated as flourishing — the activity of the soul in accordance with virtue across a complete life.
Eudaimonia is the central concept of Aristotle's Nicomachean Ethics. The Greek word combines eu (good) and daimon (spirit) and means something closer to having a good guiding spirit than to the modern English happiness, which connotes a feeling state. For Aristotle, eudaimonia is not a feeling but an activity: the lifelong activity of the rational soul in accordance with virtue, exercised within a well-ordered political community.
The Stoics, Epicureans, and Skeptics adopted the vocabulary of eudaimonia while disagreeing on its content. The Stoics held that eudaimonia consists in virtue alone; the Epicureans, in stable pleasure; the Skeptics, in suspended judgment. The Anglophone revival of virtue ethics in the twentieth century — Anscombe, Foot, MacIntyre, Nussbaum — has returned to Aristotle's framework as an alternative to deontological and utilitarian ethics.