Орос
See also: орос
Mongolian
Etymology
From Russian русь (rusʹ) or Русь (Rusʹ). Mongolian does not allow word-initial r-, and regressive vowel harmony generated the prosthetic word-initial vowel.
Proper noun
Орос • (Oros) (Mongolian spelling ᠣᠷᠤᠰ (orus))
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