reservewatchman
nounUK /rɪˈzɜːvˌwɒtʃmən/
US /rɪˈzɜːrvˌwɑːtʃmən/
A reserve watchman is a helper who keeps a place safe when the main guard is resting.
The reserve watchman checked the gates while the night guard took a break.
OTHER MEANINGS
2. A person kept ready to take over watching duties if needed.
The reserve watchman was called in when the regular guard got sick.
3. A member of a backup team that protects a building or area.
Every reserve watchman must know the emergency exits.
4. Someone who watches over a stored supply or protected land.
The reserve watchman counted the tools in the shed each morning.