εὐθυμία

English (LSJ)

ἡ,

   A cheerfulness, contentment, Pi.I.1.63, Pae.1.2, B.16.125, X.Cyr.4.5.7, Philem.96.4, Men.231, etc.: in pl., Pi.O.2.34, X.Cyr.1.3.12, Arist.Pr.954a25; περὶ εὐθυμίης, title of works by Democritus and Hipparchus Pythagoreus.    II Εὐ. personified, Pi.Fr.155, Memn.4.2, LW45 (Erythrae).