IPA: /ˈwɪn.dəʊ.peɪn/
KK: /ˈwɪndoʊpeɪn/
A flat piece of glass that is used to fill a window frame, allowing light to enter while keeping out the weather.
The windowpane shattered when the ball hit it.
Windowpane → It is formed from "window" (from Old Norse *vindauga*, meaning wind eye) and "pane" (from Old French *pan*, meaning a piece or a panel). The word "windowpane" refers to a panel of glass that serves as the eye through which wind and light enter a building.
Think of a 'window' as an 'eye' for the wind, and a 'pane' as a 'piece' of glass — together, they create a transparent barrier that lets in light and air.
No commonly confused words.