The crossword solution for the term 'OPENS A LOCK' is UNBOLTS, which is a seven-letter word. Unbolting is the process of removing a bolt or nut from a joint in order to open a lock. This is usually done with a wrench or other tool that can turn the bolt or nut in order to loosen it. Unbolting is a common task when opening locks, as it allows the user to gain access to whatever is inside the lock.