sash window

US /ˈsæʃ ˌwɪn.doʊ/
UK /ˈsæʃ ˌwɪn.doʊ/
"sash window" picture
1.

a window consisting of one or more sashes that are movable in grooves, typically sliding up and down or side to side

:
The old house had beautiful wooden sash windows.
We need to repair the broken cord on the sash window.