scuncheon
/ˈskʌntʃən/
noun
- The inner side of a window frame or door frame, especially the part that is visible from inside a room.
- Dust had collected on the scuncheon where the curtain rod was mounted.
- She painted the scuncheon of the window a bright white to match the trim.
- The old house had deep scuncheons that made the windows look like little alcoves.