blas·pheme (blăs-fēm, blăsfēm′)
v. blas·phemed, blas·phem·ing, blas·phemes
1. To speak of (God or a sacred entity) in an irreverent, impious manner.
2. To revile; execrate.
To speak blasphemy.
[Middle English blasfemen, from Old French blasfemer, from Late Latin blasphēmāre, from Greek blasphēmein, from blasphēmos, evil-speaking, blasphemous; see bhā-2 in the Appendix of Indo-European roots.]
blas·phemer (blăs-fēmər, blăsfə-) n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.