Where does “ketter” come from?

ketter (Middle Dutch) comes from Latin catharus, from Ancient Greek καθαρός — clean, clear, pure.

Ancestry of “ketter”, step by step

Step	Language	Word	Meaning
1	Latin	catharus	—
2	Ancient Greek	καθαρός	clean, clear, pure

Words derived from “ketter”

Every word from Ancient Greek καθαρός →Every word from Latin catharus →