Tether (noun)

A rope or chain used to tie an animal or object to a fixed point, a restraint.

Origin:

Late middle english (as a noun in the sense "restraint"): from old english tæþer, of germanic origin; related to dutch teder and german zeder "cord, rope".

Examples:

1. The horse was tethered with a tether to a tree.
2. The boat was secured to the dock with a tether.
3. They used a tether to keep the balloons anchored to the ground.
4. The children used a tether to secure their kites to a tree.
5. The dog was on a tether while they were out for a walk.