a cord or rope: a length of twisted fiber used to bind, lift, hold, or measure
At its base this word names a physical rope, the everyday tool for tying, hauling, and tethering. Rahab lowers the spies by it, men drag Jeremiah out of a cistern with it, and a fisherman is imagined snaring a sea-monster on one. The same rope can be a measuring line, stretched out to lay off distances and boundaries.
Because a rope binds and traps, the word reaches naturally into images of being caught. Poets speak of the cords of death or of the grave closing around a person, of cords of guilt that tie the wicked to their own wrongdoing, and of hidden snares set in someone's path. In these places the rope is felt rather than seen: it is whatever holds a person fast.
These uses share one picture, a binding line, even when the line is literal in one verse and a figure of speech in the next. Where the cord becomes the measured share of land it marks off, the sense shifts enough that a reader needs a different English word, and that use is treated separately below.