9 letters · 18 points in Scrabble
verb utter obscenities or profanities
verb speak of in an irreverent or impious manner
originFrom Middle English blasfeme, blasphem, blaspheme, from Middle French blaspheme, from Old French blasfeme, from Ecclesiastical Latin blasphēmia, from Ancient Greek βλασφημία (blasphēmía).
Etymology from Wiktionary, CC BY-SA 3.0