Someone employed to clean and maintain a building.

Roget 263: stopper, stopple; plug, cork, bung, spike, spill, stopcock, tap; rammer^†; ram, ramrod; piston; stop-gap; wadding, stuffing, padding, stopping, dossil^†, pledget^†, tompion^†, tourniquet.    cover etc. 223; valve, vent peg, spigot, slide valve.    janitor, doorkeeper, porter, warder, beadle, cerberus, ostiary^†.    ... show more

Dutch: portier, concierge, conciërge, huisbewaarder
Polish: woźny