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de-energize

[dee-en-er-jahyz]
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verb (used with object), de-en·er·gized, de-en·er·giz·ing.
  1. to deprive of electrical energy or exhaust the electrical energy from: Turning off the ignition de-energizes the spark plugs.
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Also especially British, de-en·er·gise.

Origin of de-energize

First recorded in 1885–90; de- + energize
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for deenergized

de-energize

de-energise

verb
  1. (tr) electrical engineering to disconnect (an electrical circuit) from its source
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Derived Formsde-energization or de-energisation, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012