master bedroom

US /ˈmæs.tɚ ˌbed.ruːm/
UK /ˈmæs.tɚ ˌbed.ruːm/
"master bedroom" picture
1.

the main bedroom in a house, usually the largest one and often with an attached bathroom

:
The house has three bedrooms, including a spacious master bedroom with an en-suite bathroom.
They decided to redecorate the master bedroom first.