locksmith
n. countablen. a person who makes, repairs, or opens locks. In some places, this word is also used to describe a person who makes or sells illegal gambling machines.
n. a person who installs, repairs, or opens locks and keys. In specific regional or historical contexts, it may refer to an individual who operates or maintains illegal gambling devices.
I called a locksmith to help me get into my locked car.
The local locksmith provided a duplicate key after the original was lost during the move.
While the primary role of a locksmith involves securing residential and commercial properties, the term occasionally appears in historical gambling contexts to describe those who maintained illicit gaming equipment.
From Middle English loksmith; equivalent to lock + smith.