verb (used with object), disabled, disabling.
to make unable or unfit; weaken or destroy the capability of; incapacitate: The detective successfully disabled the bomb. He was disabled by the accident.
to make legally incapable; disqualify.

1475–85; dis-1 + able

disablement, noun
disabler, noun

1. enfeeble, paralyze.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
disable (dɪsˈeɪbəl)
1.  to make ineffective, unfit, or incapable, as by crippling
2.  to make or pronounce legally incapable
3.  to switch off (an electronic device)

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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Word Origin & History

mid-15c., from dis- "do the opposite of" (see dis-) + pp. of ablen (v.) "to make fit." Related: Disabled.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Unplug the network cable and disable any wireless networking.
It is perhaps more surprising that there also seems to be demand for products
  that disable features.
Disable its action and muscles will grow in parts of the anatomy where other
  animals do not even have them.
The more complex communications networks become, the harder it is to disable
  them swiftly, remotely or unilaterally.
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