Where does “pureté” come from?

pureté (French) comes from Old French purté, from Latin pūritās, from Latin pūrus, from Proto-Indo-European pewH- — to be clean, pure.

pureté (French): purity

Definitions

Step	Language	Word	Meaning
1	Old French	purté	—
2	Latin	pūritās	—
3	Latin	pūrus	—
4	Proto-Indo-European	pewH-	to be clean, pure

pureté — Etymology, Origin & Word History | Etymology Explorer