Where does “magpatunay” come from?

magpatunay (Tagalog) comes from Tagalog mag-, from Tagalog sibuyas, from Spanish cebolla, from Old Spanish cebolla, from Late Latin cepulla, from Latin cēpa — onion.

magpatunay (Tagalog): to prove; to certify

Definitions

to prove; to certify

Ancestry of “magpatunay”, step by step

Step	Language	Word	Meaning
1	Tagalog	mag-	actor trigger: to do something; actor trigger: to...
2	Tagalog	sibuyas	onion
3	Spanish	cebolla	onion
4	Old Spanish	cebolla	onion
5	Late Latin	cepulla	onion-bed, onion-field; small onion
6	Latin	cēpa	onion

Every word from Latin cēpa →Every word from Tagalog mag- →Every word from Late Latin cepulla →