удирдах

(Ulaanbaatar) IPA^(key): /ʊtʲərtəx/, [ˈɵtʲɪrtɵχ]

From *udurid-, equivalent to Proto-Mongolic *udu- (“to follow”) +‎ -рь (-rʹ) (“sequence”) +‎ -дах (-dah) (“to guide a sequence (retinue), to manage”). Compare Kalmyk удр татх (udr tatx, “to lead”, literally “to pull a sequence”), Ordos ᠤᠳᠤᠷᠢᠳᠬᠤ (uduridqu, “to take the initiative in doing something”).

As for *udu- itself, it is likely a borrowing from Proto-Turkic *ūð- (“to follow”), compare Turkish uymak.

удирдах • (udirdah) (Mongolian spelling ᠤᠳᠤᠷᠢᠳᠬᠤ (uduridqu))

1. to manage, to control
2. to lead, to guide

• удиртгал (udirtgal, “introduction”)
• удирдлага (udirdlaga, “management”)
• удирдамж (udirdamž, “guidelines”)
• удирдаач (udirdaač, “conductor”)
• удирдвар (udirdvar, “full score”)

• Doerfer, Gerhard (1963–1975) Türkische und mongolische Elemente im Neupersischen [Turkic and Mongolian Elements in New Persian] (Akademie der Wissenschaften und der Literatur: Veröffentlichungen der Orientalischen Kommission) (in German), Wiesbaden: Franz Steiner Verlag, page 162-163