v. (UN-2 4; cf. KEY v.)
1751. Labelye, Westm. Bridge, 22. Upon unkeying any one of the Arches the whole Bridge would fall.
1828. Spearman, Brit. Gunner (ed. 2), 183. [No. 3] keys and unkeys the left hand cap-square of the gun-carriage.
1840. Civil Eng. & Arch. Jrnl., III. 402/1. The labour … of removing the wheels from the axles, which in the keying and unkeying is known to be very troublesome.
1859. F. A. Griffiths, Artill. Man. (ed. 8), 179. No. 1 attends to the pawls and commands, keys, and unkeys keep chain.
