Dictionary entry

Tether (2)

Webster's Dictionary 1913

Teth″er, v. t. [imp. & p. p.Tethered (?); p. pr. & vb. n.Tethering.] To confine, as an animal, with a long rope or chain, as for feeding within certain limits.

And by a slender cord was tethered to a stone. Wordsworth.