Where does “мәш” come from?

мәш (Kazakh) comes from Persian ماش, from Sanskrit माष — any Old World bean; urad.

Ancestry of “мәш”, step by step

Step	Language	Word	Meaning
1	Persian	ماش	mung bean and mungo bean "Vigna mungo", ماش سیاه
2	Sanskrit	माष	any Old World bean; urad

мәш — Etymology, Origin & Word History | Etymology Explorer