v. [UN-2 3.] trans. To remove, take down, from being stacked or piled up.
1859. R. F. Burton, Centr. Afr., in Jrnl. Geog. Soc., XXIX. 414. The porters … unstack the loads propped against the trees.
1863. W. Thornbury, True as Steel, III. 39. The enemy … already were beating the alarm, unstacking their weapons, and gathering outside their tents.
1888. Pall Mall G., 18 Feb., 6/2. In unstacking some timber … the men came across a newly-made sparrow’s nest.
