Present participle of blaspheme; speaking disrespectfully or irreverently about God or sacred things.
From blaspheme plus the present participle suffix -ing. Shows how the Greek-origin word was fully adopted into English verb conjugation patterns.
The -ing form turns a religious crime into an ongoing action—'blaspheming' captures the continuous nature of irreverent speech in a way the noun 'blasphemy' doesn't!
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