IPA: /ˈmʌntɪn/
KK: /ˈmʌntɪn/
A narrow piece of wood or metal that divides and supports the glass panes in a window or door.
The old house had beautiful stained glass windows with intricate muntins separating the panes.
Muntin → The word 'muntin' originates from Middle English 'montyn', which is derived from the Old French 'montin', meaning a small piece or strip of wood. A muntin is a strip of wood that divides and supports panes of glass in a window.
Think of a small 'strip of wood' that 'divides' glass panes — that's what a muntin does.