Where does “bidüxün” come from?

bidüxün (Proto-Mongolic) comes from Proto-Turkic bedük, from Proto-Turkic bedü- — to grow, become large; to grow big; to become...

Ancestry of “bidüxün”, step by step

Step	Language	Word	Meaning
1	Proto-Turkic	bedük	big; tall; big, tall
2	Proto-Turkic	bedü-	to grow, become large; to grow big; to become...