In a manner relating to or involving apostasy; in the way of abandoning one's faith or principles.
From 'apostatical' with the adverbial suffix '-ly', forming an adverb that describes actions or behavior connected to apostasy or religious defection.
When historians say someone acted 'apostatically,' they're describing a deliberate, decisive turn away from faith—not just quietly doubting, but publicly rejecting what they once held sacred.
Complete word intelligence in one call. Free tier — 50 lookups/day.