cord, string

Strong’s Dictionary of Hebrew Words:

Transliteration:
meythar
Phonic:
may-thar’
Meaning:
from 3498; a cord (of a tent) (compare 3499) or the string (of a bow)
KJV Usage:
cord, string

From Manners and Customs of the Bible:

Job 41:22Canst thou put an hook into his nose? or bore his jaw through with a thorn? (Job 41:2). Canst thou put a hook into his nose? or bore his jaw through with a thorn?
1. Agmon, “hook,” is more correctly a rush-cord or rope made of reeds, (Gesenius;) and the question of the text suggests the wonderful strength of the leviathan by the impossibility of putting a rope around his nose, thus binding his jaws.
2. Choach, “thorn,” is really a ring; and the text probably refers to a custom, very ancient and still practiced, of inserting a strong iron ring into the jaw of a fish as soon as caught. A cord is fastened to the ring and the fish is let down into the water, where it remains until the fisherman has an opportunity of selling it.