I.without means or resource, at a loss, τινος about one, Od.; ἀμ. εἴς τι awkward at a thing, Eur.:—adv., ἀμηχάνως ἔχειν ῀ ἀμηχανεῖν, Aesch., Eur.
2.c. inf. at a loss how to do, unable to do, Soph., Dem., etc.
II.in pass. sense,
1.impracticable, difficult, c. inf., ἀμήχανός ἐσσι πιθέσθαι Il.; ὁδὸς ἀμ. εἰσελθεῖν a road hard to enter on, Xen.; ἀμήχανόν ἐστι, c. inf. 'tis impossible, Hdt., etc.:—absol., ἀμήχανα impossibilities, Aesch., etc.
2.against whom nothing can be done, irresistible, of gods, Il.:—of things, ἀμήχανα ἔργα mischief without resource or remedy, id=Aesch., Hes., Trag.; of dreams, inexplicable, Od.
3.extraordinary, immense, Plat.; ἀμήχανον εὐδαιμονίας an extraordinary amount of happiness, id=Il.:—often c. acc., ἀμήχανος τὸ μέγεθος, τὸ κάλλος, τὸ πλῆθος, i. e. inconceivable in point of size, etc., id=Plat., Xen.:—Plat. often adds the relatives οἷος, ὅσος, and ὡς, as, ἀμήχανον ὅσον χρόνον an inconceivable length of time, ἀμηχάνως ὡς εὖ extraordinarily well.