Tether

Noun

 * 1) a rope, cable etc. that holds something in place whilst allowing some movement
 * 2)  the limit of one's abilities, resources etc
 * 3)  The cardinal number three in an old counting system used in Teesdale and Swaledale. (Variant of tethera)

Verb

 * 1) to restrict something with a tether

Thesaurus
Oregon boat, anchor, batten, batten down, belay, bilbo, bind, bond, bonds, bridle, camisole, chain, chains, collar, cord, cuffs, enchain, entrammel, fasten, fasten down, fetter, gag, gyve, gyves, halter, hamper, handcuff, handcuffs, harness, hitch up, hobble, hobbles, hog-tie, hook up, hopple, hopples, irons, lash, lead, leading strings, leash, make fast, make secure, make sure, manacle, moor, muzzle, peg down, picket, pillory, pin down, pinion, put in irons, reins, restrain, restraint, restraints, rope, saddle, secure, shackle, stake, stocks, straightjacket, strait-waistcoat, straitjacket, stranglehold, strap, tie, tie down, tie up, trammel, trammels, yoke