ἀτονία

English (LSJ)

ἡ,

   A slackness, enervation, debility, Hp.Aër.20; laziness, Epicur.Nat.54 G.; ψυχῆς Plu.2.535d; ἀσθένεια καὶ ἀ. Luc.Nigr.36; ἰνῶν ἀ. καὶ τρόμος Phld.Acad.Ind.p.76M.; as Stoic term, lack of τόνος (q.v.), Chrysipp.Stoic.3.120,123, Arr.Epict. 2.15.4, etc.; in oratory, lack of vigour in delivery, Hermog.Inv.4.