IPA: /ʌnˈʃʌt/
KK: /ʌnˈʃʌt/
To open something that was closed, like a door or window.
She decided to unshut the window to let in some fresh air.
Past: unshut
Past Participle: unshut
Unshut → It is formed from "un-" (meaning not) and "shut" (from Old English "scyttan", meaning to close). The word "unshut" means not closed or opened again.
Think of 'not' ('un-') being applied to 'closed' ('shut') — that's why unshut means to be opened again.