undock

from WordNet (r) 3.0 (2006)
undock
    v 1: move out of a dock; "We docked at noon" [ant: {dock}]
    2: take (a ship) out of a dock; "undock the ship" [ant: {dock}]
from The Collaborative International Dictionary of English v.0.48
Undock \Un*dock"\, v. t. [1st pref. un- + dock.] (Naut.)
   To take out of dock; as, to undock a ship.
   [1913 Webster]
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