tether

[teth-er]
noun
1.
a rope, chain, or the like, by which an animal is fastened to a fixed object so as to limit its range of movement.
2.
the utmost length to which one can go in action; the utmost extent or limit of ability or resources.
verb (used with object)
3.
to fasten or confine with or as if with a tether.
Idioms
4.
at the end of one's tether, at the end of one's resources, patience, or strength.

Origin:
1350–1400; Middle English (noun); compare Old Norse tjōthr, Dutch tuier

untethered, adjective
untethering, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
tether (ˈtɛðə)
 
n
1.  a restricting rope, chain, etc, by which an animal is tied to a particular spot
2.  the range of one's endurance, etc
3.  at the end of one's tether distressed or exasperated to the limit of one's endurance
 
vb
4.  (tr) to tie or limit with or as if with a tether
 
[C14: from Old Norse tjothr; related to Middle Dutch tūder tether, Old High German zeotar pole of a wagon]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

tether
late 14c., "rope for fastening an animal," probably from O.N. tjoðr "tether," from P.Gmc. *teudran (cf. Dan. tøir, Swed. tjuder, O.Fris. tiader, M.Du. tuder, Du. tuier "line, rope," O.H.G. zeotar "pole of a cart"), from PIE base *deu- "to fasten" + instrumentive suffix *-tro-. Figurative sense
of "measure of one's limitations" is attested from 1570s. The verb is first recorded late 15c., from the noun.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The cushions deflate, and tethers would be attached to either side of the walls, holding the probe in place.
Our tethers to the infinite have become flimsy webs indeed.
Kites with rotors could fly to where the winds are strongest and send electricity down their tethers to users on the ground.
The quantum wires are molecular tethers made of organic compounds chemically bonded to the surface of the dot.
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