адгуус • (adguus) (Mongolian spelling ᠠᠳᠤᠭᠤᠰᠤ); (hidden-n declension )
Equivalent to адуу (aduu, “horse”) + -с (-s), with unexpected г (g) probably due to confluence of multiple forms.
(Ulaanbaatar) IPA(key): /atɢʊs/, [atˈʁo̙s]