Where does “ketter” come from?

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

Ancestry of “ketter”, step by step

StepLanguageWordMeaning
1Latincatharus—
2Ancient Greekκαθαρόςclean, clear, pure
Every word from Ancient Greek καθαρός →Every word from Latin catharus →