guardhouse
/ˈɡɑːrdˌhaʊs/Definitions
1. noun
A building, especially at a military or police post, where guards are stationed.
“The soldier was posted at the guardhouse to keep watch over the perimeter.”
2. noun
A small house or cottage, especially one serving as a dwelling for a single person.
“The old man lived in a small guardhouse by the lake.”
3. verb
To keep watch over something or someone, especially as a guard.
“The police were guarding the entrance to the palace, and no one was allowed to pass.”