A.without distinctive mark, obscure, baffling, “χρηστήριον” Hdt.5.92.“γ́; μοῖρα” A.Pers.910 (Sup.); “ἐρημία” trackless, Plu.Luc. 14; ἀτέκμαρτον προνοῆσαι without mark whereby to judge it, Pi.P. 10.63; “ἀ. δέος” Th.4.63, cf. Pl.Lg.638a. Adv. “-τως, ἔχειν ὅτου ἕνεκά ἐστι” X.Mem.1.4.4: neut. pl. as Adv., bafflingly, Pi.O.7.45.
2. of persons, uncertain, inconsistent, Ar.Av.170.