warder

A truncheon or staff of authority carried by a king, commander-in-chief, or other important dignitary.

One who keeps watch and ward; a keeper; a guard.

One who wards or keeps; a keeper; a guard.

A truncheon or staff carried by a king or a commander in chief, and used in signaling his will.

A guard, especially in a prison.

A truncheon or staff carried by a king or commander, used to signal commands.

a person who works in a prison and is in charge of prisoners