Kofer

For denial of the Jewish faith, see Heresy in Orthodox Judaism.

Kofer (כפר - the root K-F-R) is a Hebrew word, with several meanings:

Kofer-nefesh (Hebrew: כפר נפש‎)."The price of a life", "a ransom", compared to Teutonic Weregild.
The poll tax of a half shekel to be paid by every male above twenty years at the census, as described in Exodus 30:11-16.
The spelling "כופר" (with the stress on the e, which stands for צירה which is a long vowel) can mean an unbeliever, similar to the Arabic kafir.
The main meaning of the root כפר is "atone". For example, in יום כפור (Yom Kippur), the Day of Atonement.

See also