
Cognate withBuryatуурхай(uurxaj,“nest, mine”),Kalmykуурха(uurxa,“mine, source”).
Perhaps fromProto-Mongolic*huxur(“grave”) (Middle Mongolهوور,Mongghulfuuri) +-хай(-xaj) if this reconstruction is valid, that is if given cognates don't derive from*hexür(“nest”), for which seeүүр(üür).
уурхай• (uurxaj) (Mongolian spellingᠠᠭᠤᠷᠬᠠᠢ(aɣurqai));(regular declension)