Locksmith
Context
A professional who works with locks on doors, windows, safes, and cars, including making keys, fixing broken locks, and installing security systems
Explanation
Locksmiths are skilled tradespeople specializing in lock mechanisms. They install, repair, and adjust locks in everything from cars to office buildings, and they also provide services for individuals locked out of vehicles or homes.
Applications
The locksmith was called to change the locks after the keys were lost.
Modern locksmiths also work with electronic lock systems.
Locksmithing involves detailed knowledge of lock mechanics and security systems.