tighten

[tahyt-n]
verb (used with object), verb (used without object)
to make or become tight or tighter.

Origin:
1720–30; tight + -en1

tightener, noun
overtighten, verb
retighten, verb
self-tightening, adjective
untighten, verb (used with object)


secure, anchor, fasten.
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World English Dictionary
tighten (ˈtaɪtən)
 
vb
1.  to make or become tight or tighter
2.  tighten one's belt to economize
 
'tightener
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

tighten
"to make tight," 1727; the earlier verb was simply tight, from O.E. tyhtan, from the root of tight.
Online Etymology Dictionary, © 2010 Douglas Harper
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