Where does “kamuhurwa” come from?

kamuhurwa (Tumbuka) comes from Tumbuka ka-, from Taos ká-.

Ancestry of “kamuhurwa”, step by step

Step	Language	Word	Meaning
1	Tumbuka	ka-	Class 12 noun prefix, used with a diminutive or depreciative meaning
2	Taos	ká-	—