A.“-ήσω” Th.7.48: impf. “ἠμηχάνουν” Pl.Com. 45:—to be ἀμήχανος, to be at a loss for, or in want of, “χρήματος οὐδενός” Hdt.1.35, cf. A.R.4.692; ἀ. περί τινος about thing, E.IT734: c. acc., “τέρμα” A.Ag.1177, etc.; “ταῦτα” E.Heracl.492: c. dat., “ἀ. θεσφάτοισι” A.Ag.1113:—freq. foll. by relative clause, ἀ. πότερον . . ἤ . . S.Ph. 337; ἀ. ὅπᾳ τράπωμαι, ὅποι τράποιντο, A.Ag.1530, Pers.458: abs., A. Supp.379, S.El.1174, E.Andr.983, Epicur.Fr.203, etc.
2. c. inf., not to know how to do, “ὄσσαν συμβαλεῖν ἀμηχανῶ” Neophr. 1; χρόνος . . ὃν λανθάνειν ἀ. know not how to escape, Antiph.254.