Utter impious words (9)

I believe the answer is:

blaspheme

(Other definitions for blaspheme that I've seen before include "Speak irreverently about God" , "Curse profanely" , "Talk irreverently about God and sacred things" , "Utter obscenities or profanities" , "Swear" .)

I've seen this clue in the Sydney Morning Herald.

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