Kipper
Hebrew Word: כִּפֶּר (kipper)
Pronunciation: Kip-per
Root: כפר (k-p-r), which in the Piel stem (as used here) means "to make atonement," "to expiate," or "to cover over (sin)."
involves the offering of a sacrifice (e.g., a bull, goat, or lamb), the application of blood to the altar, and other ritual actions, resulting in forgiveness (nislach, from salach, "to forgive") for the unintentional sin.
The precise meaning of kipper is debated among scholars,