Where does “محرم” come from?

محرم (Malay) comes from Arabic مُحَرَّم, from Arabic حَرَّمَ — to forbid.

Ancestry of “محرم”, step by step

Step	Language	Word	Meaning
1	Arabic	مُحَرَّم	forbidden
2	Arabic	حَرَّمَ	to forbid

محرم — Etymology, Origin & Word History | Etymology Explorer