Serving as or intended for atonement or expiation; capable of making amends.
From Latin expiatorius, from expiator. This is the standard adjectival form in English, borrowed directly from Latin with the -ory suffix denoting purpose or function.
The phrase 'expiatory sacrifice' appears repeatedly in the Bible and classical texts—it's a key concept in understanding why ancient peoples performed ritual killing, which was meant to restore divine favor and balance.
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