manhole
"Manhole" is a straightforward English noun with essentially one main meaning. You have probably seen one on the street without knowing its name!
A manhole is a round or square opening in a road, pavement, or floor that is large enough for a person to climb through. It gives workers access to underground systems like sewers, pipes, cables, or tunnels. You have almost certainly walked over one — they are usually covered with a heavy metal lid called a manhole cover.
everyday language, construction, engineering · Modern, widely used