From Proto-Mongolic *nidüxür, compare Dongxiang nudun.
Analyzable as нүд- (nüd-, “to beat, to grind”) + -үүр (-üür).
нүдүүр • (nüdüür) (Mongolian spelling ᠨᠦᠳᠦᠭᠦᠷ (nüdügür), definite plural нүдүүрүүд); (regular declension)