The story
- Proto-Indo-European · inherited from*neid-/*nid-“flow”
- Proto-Germanic · inherited from*Nidā
- Proto-West Germanic · inherited from*Nǐd
- Old English · inherited from*Nid
- English todayNidd
From Old English *Nid, from Proto-West Germanic *Nǐd, from Proto-Germanic *Nidā, from Proto-Indo-European *neid-/*nid- (“flow”).
Etymology from Wiktionary, CC BY-SA 4.0.