that which holds; and so,
hindrance, impediment, Il. 21.259 (pl.).
c. gen., bulwark, defence against, ἐπηλυσίης h.Merc. 37; βολάων A.R. 4.201.
holdfast, stay, ἔχματα πέτρης the grip of the rock (viz. the river-bed), Il. 13.139; ἔχματα πύργων buttresses of the fortifications, 12.260; ἔχματα νηῶν props or cradles for the ships, 14.410; ἔχματα γαίης, of the earth which holds fast the roots of a tree, A.R. 1.1200; ἔχματα γούνων, of muscles, Nic. Th. 724:—also ἐχμός, ὁ, Eust. 1411.24.