Where does “chlor” come from?

chlor (Polish) comes from New Latin chlorum, from Ancient Greek χλωρός, from Proto-Indo-European ghlo-.

chlor (Polish): chlorine

Definitions

Step	Language	Word	Meaning
1	New Latin	chlorum	chlorine
2	Ancient Greek	χλωρός	greenish-yellow, pale green; pale, pallid; fresh,...
3	Proto-Indo-European	ghlo-	—

chlor — Etymology, Origin & Word History | Etymology Explorer