ἀκτή · aktē — LSJ
headland, foreland, promontory, ἀ. προὔχουσα Od. 24.82; ἀ. προβλῆτες 5.405, 10.89; opp. λιμήν, Il. 12.284; often with epithets, denoting high rugged coast, τρηχεῖα, ὑψηλή, Od. 5.425, Il. 2.395; τρηχέα Hdt. 7.33; στυφλοί A. Pers. 303; ἀμφίκλυστος S. Tr. 752; στόνῳ βρέμουσι δʼ ἀντιπλῆγες ἀκταί Id. Ant. 592:— usu. of sea-coast, χλωρὰ ἀ. ib. 1132; ἀκταὶ ἔναλοι Tim. Pers. 109; but also of rugged banks or strand of rivers, Ἑλώρου, Νείλου, Pi. N. 9.40, I. 2.42; Σιμόεντος A. Ag. 697; Ἀχέροντος S. Ant. 8
generally, tract of land running out into the sea, ἀ. διφάσιαι of the north and south coasts of Asia Minor, Hdt. 4.38; of Africa, as jutting out from Asia, 4.41, cf. 177; of Cape Sepias, 7.183, al.; of Mt.Athos, Th. 4.109; of Italy, Arist. Pol. 1329b11; of the peninsula of the Piraeus, Hyp. Fr. 185, Arist. Ath. 42.3, Lycurg. 17 (also of Attica in general, E. Hel. 1673, cf. Str. 9.1.3); of the coast of Argolis, Plb. 5.91.8, D.S. 12.43: pl., ἀκτὰς τῆσδε γῆς S. Fr. 24.
generally, edge, χώματος ἀ. of a sepulchral mound, A. Ch. 722; βώμιος ἀ. of an altar, S. OT 182 (lyr.). (As there is no trace of ϝ, the word is more probably connected with √ak ‘pointed’ than with ϝάγ-νυμι.)