This is the 11449th most frequent Polish word.
izbie
"Izbie" is the locative form of "izba," meaning "room" or "chamber" in English.
Here, 'izbie' (in the chamber/room) refers to an enclosed space inside a building.
W izbie było bardzo gorąco.
In the chamber, it was very hot.
In this usage, 'izbie' specifies a particular type of room, the doctor's office.
Spotkaliśmy się w izbie lekarskiej.
We met in the doctor's room.
Here, 'izby' refers to a designated space or chamber with a specific historical context.