εὔτονον

From LSJ

Εὐδαίμονες οἷσι κακῶν ἄγευστος αἰών → Blessed are those whose lives have no taste of suffering

Sophocles, Antigone, 583

Russian (Dvoretsky)

εὔτονον: τό Plat., Arst. = εὐτονία.