\Un*moor"\, v. t. [1st pref. un- + moor.] (Naut.)
(a) To cause to ride with one anchor less than before, after
    having been moored by two or more anchors.
(b) To loose from anchorage. See {Moor}, v. t.

\Un*moor"\, v. i.
To weigh anchor. --Sir W. Scott.