used to denote the means by which a door is bolted (Neh. 3:3); a rock in the sea (Jonah 2:6); the shore of the sea (Job 38:10); strong fortifications and powerful impediments, etc. (Isa. 45:2; Amos 1:5); defences of a city (1-Kings 4:13). A bar for a door was of iron (Isa. 45:2), brass (Psa 107:16), or wood (Nah. 3:13).