Answer: guardhouse

AnswerCrossword Clue
GUARDHOUSESentries' building
GUARDHOUSEMilitary lockup
guardhouseA building accommodating a guard who controls entrance to the grounds of a house, housing development, school, or other facility
guardhousea building for the accommodation of a military guard, and where prisoners are confined
guardhouseA building used to accommodate a military guard or to detain military prisoners