II. baneful, mischievous, “δύη” A.Pr.746; “τύχη” Id.Ag.1483 (lyr.); “κακόν” E.Andr.353; “ναυτιλίη” AP9.23 (Antip.); “τὸ ἀ.” bane, mischief, A.Eu.1007 (anap.); μή τι ἀ. ποιέωσι [οἱ παῖδες] Democr. 279.—Once in Com., ἀτηρότατον κακόν an 'outrageous' nuisance, Ar.V.1299; and so Adv. -ῶς 'awfully' as a slang word, Phld.Mus. p.105K.: in Pl.Cra.395b and c introduced only for an etym. purpose: also in later Prose, D.L.6.99.
ἀτηρός [α_], ά, όν,