/ blæsˈfiːm; NAmE / verb
[ v , vn ] to speak about God or the holy things of a particular religion in an offensive way; to swear using the names of God or holy things
► blas·phemer noun
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WORD ORIGIN
Middle English : via Old French from ecclesiastical Latin blasphemare reproach, revile, blaspheme, from Greek blasphēmein , from blasphēmos evil-speaking. Compare with blame .