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undock

[uhn-dok] /ʌnˈdɒk/
verb (used with object)
1.
to uncouple (two spacecraft modules or a spacecraft and space station).
verb (used without object)
2.
(of a spacecraft module or spacecraft) to uncouple.
Origin
1920-1925
1920-25; un-2 + dock1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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