de commission

decommission

[dee-kuh-mish-uhn]
verb (used with object)
1.
to remove or retire (a ship, airplane, etc.) from active service.
2.
to deactivate; shut down: to decommission a nuclear power plant.

Origin:
1925–30; de- + commission

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World English Dictionary
decommission (ˌdiːkəˈmɪʃən)
 
vb
(tr) to dismantle or remove from service (a nuclear reactor, weapon, ship, etc which is no longer required)

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

decommission
1922, originally with reference to warships, from de- + commission (v.).
Online Etymology Dictionary, © 2010 Douglas Harper
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