Where does “صِفْر” come from?

صِفْر (Andalusian Arabic) comes from Arabic صِفْر, from Sanskrit शून्य, from Proto-Indo-European ḱówH-.

Ancestry of “صِفْر”, step by step

Step	Language	Word	Meaning
1	Arabic	صِفْر	zero, nothing, empty, void; nothing, cipher;...
2	Sanskrit	शून्य	zero; cipher, cypher; blank, deserted
3	Proto-Indo-European	ḱówH-	—

صِفْر — Etymology, Origin & Word History | Etymology Explorer