teth·er /ˈtɛðɚ/
系繩,系鏈,界限,範圍(vt.)栓,束縛,限制
Teth·er n. A long rope or chain by which an animal is fastened, as to a stake, so that it can range or feed only within certain limits.
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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tether
n : restraint consisting of a rope (or light chain) used to
restrain an animal [syn: leash, lead]
v : tie with a tether; "tether horses"