The term 'lock' can refer to a variety of different things, including a FASTENER (8 letters), FASTEN (6 letters), HAIR (4 letters), CLASP (5 letters), CLOSE (5 letters), HUG (3 letters), CATCH (5 letters), num (3 letters), CURL (4 letters), STEP (4 letters), WOOL (4 letters), LATCH (5 letters), TRESS (5 letters), shooin (6 letters), RINGLET (7 letters), surebet (7 letters), holdinwrestling (15 letters), panamacanalpart (15 letters), and unbreakablehold (15 letters). These words all refer to different types of locks, which are used to secure items or keep them closed. Fasteners, clasps, and latches are physical locks that are used to secure items together, while HAIR, curls, and tresses are locks of HAIR. Hugs, catches, and nums are figurative locks that are used to keep people or things CLOSE. Finally, surebet, holdinwrestling, panamacanalpart, and unbreakablehold are all metaphors for something that is impossible to break or escape from.