Niht-helm
Bosworth & Toller Anglo-Saxon Old English Dictionary - niht-helm
According to the Old English Dictionary:
es ;
- niht-helm
- m. The covering of night, night's curtain :-- Niht-helm geswearc deorc ofer dryhtgumum night's curtain dark was drawn over men, Beo. Th. 3583 ; B. 1789. niht-helm