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.
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tethered
adj : confined or restricted with or as if with a rope or chain