Relating to or characteristic of Ahriman; evil, destructive, or chaotic in nature according to Zoroastrian philosophy.
From 'Ahriman' (the evil spirit in Zoroastrianism) plus the English suffix '-ian,' creating an adjective meaning 'of or relating to Ahriman.' This religious and philosophical term entered English through scholarly discussion of Persian religions.
Using 'Ahrimanian' as an adjective let scholars describe cosmic evil without saying 'demonic'—it's the kind of specialized vocabulary that makes philosophy and religious studies sound wonderfully esoteric.
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