Etymologically

infidel

Etymology and origin of the English word infidel

Pronunciation

  • IPA: /ˈɪn.fə.dl̩/, /ˈɪn.fəˌdɛl/[1]

Etymology

It is inherited from Middle English infidele, borrowed from Middle French infidèle,[2][3][4][5] from Latin īnfidēlis (“unfaithful; in Late Latin, unbelieving”),[2][3][4][5][6] from Latin in- (“not”) + fidēlis (“faithful”).[2][3][4][5]

Earliest recorded meaning

From a Christian point of view, an adherent of a religion opposed to Christianity, especially a Muslim or Saracen (1470–85).[7][3][4]

Semantic evolution

By 1526 the word meant one who disbelieves in religion generally,[7][3][4] especially one in a Christian land who rejects Christianity.[7] It was also used to translate Arabic kāfir, and so from a Muslim or Jewish point of view meant a Christian or other non-believer (1534).[7][4][6] From 1606 it meant anyone who disbelieves a particular doctrine or principle.[7][2]

Timeline

  • c. 1470 – adjective, unbelieving, heathen.[3][7]
  • 1470–85 – a non-Christian, especially a Muslim.[7][3]
  • 1526 – a disbeliever in religion.[7][3][4]
  • 1534 – from a Muslim or Jewish view, a non-believer.[7]
  • 1606 – a disbeliever in some principle.[7]

Modern meaning

Noun

  1. An unbeliever with respect to a particular religion, especially Christianity or Islam.
  2. A person who has no religious beliefs.
  3. A person who doubts or rejects a particular doctrine or principle; a skeptic.

Adjective

  1. Not accepting a particular faith; heathen; also, without religious faith.
  • fidelity
  • infidelity
  • faith
  • heathen
  • kaffir

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin
  3. ^ a b c d e f g h Barnhart, Robert K., ed. (1995), The Barnhart Concise Dictionary of Etymology, New York: HarperCollins
  4. ^ a b c d e f g Harper, Douglas, Online Etymology Dictionary, https://www.etymonline.com
  5. ^ a b c Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
  6. ^ a b Random House Webster's Unabridged Dictionary (1999), 2nd ed., New York: Random House
  7. ^ a b c d e f g h i j Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press

Related etymologies

Cite this entry

“Infidel.” Etymologically, 11 Oct. 2026, etymologically.com/en/infidel. Accessed 11 Oct. 2026.

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