Possible Clues:

• Covered with a movable screen, as a window might be
• No longer in business
• (Of windows) shut up
• Having the means to exclude light, say, in hut
• Covered with a movable screen, a window perhaps
• Closed with hinged covers
• Closed with screens
• Kept in dark, say, in hut
• Quiet-spoken, like some windows
• It's said to be quiet when the window's closed over