Where does “berlawak” come from?

berlawak (Indonesian) comes from Indonesian ber-, from Malay ber-, from Classical Malay ber- — having; -ed, -d; producing; multiple.

Ancestry of “berlawak”, step by step

Step	Language	Word	Meaning
1	Indonesian	ber-	having; -ed, -d; producing; multiple
2	Malay	ber-	used to form stative verbs; having; -ed, -d,...
3	Classical Malay	ber-	having; -ed, -d; producing; multiple