v. [UN-2 3, 4 b.]
1. trans. To let slip, set free.
1611. Florio, Sguinzagliare, to vncouple, to vnslip, to let goe as Spaniels.
1801. Surr, Splendid Misery, III. 215. Tis not the sudden impulse of a fleeting passion that has unslipped from cautions trammel a rebellious tongue.
1846. Whittier, To Southern Statesman, 6. When thy eager hand With game afoot, unslipped the hungry pack To hunt down Freedom in her chosen land.
2. To slip back.
1892. Zangwill, Bow Mystery, 125. [He] went downstairs, [and] unslipped the bolt of the big lock.