Nab

Part of speech: noun (n.)

1. The summit of an eminence. [Prov. Eng.] Halliwell.

2. The cock of a gunlock. Knight.

3. The keeper, or box into which the lock is shot. Knight.

Part of speech: verb (v.)

To catch or seize suddenly or unexpectedly. [Colloq.] Smollett.