realm of the dead in Norse mythology, from Old Norse nifl- "mist; dark" (from Proto-Germanic *nibila-, from PIE root *nebh- "cloud") + heimr "residence, world" (from Proto-Germanic *haimaz, from PIE root *tkei- "to settle, dwell, be home").
nidus
niece
Nielsen
Nietzschean
nieve
Niflheim
nifty
nig
Nigel
Niger
Nigeria