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faithful

Etymology and origin of the English word faithful

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Confidence
Established
Formation
Derivation
First attested
before 1300
Ultimate origin
English (faith,-ful)

Pronunciation

  • IPA: /ˈfeɪθ.fl̩/[1]

Etymology

It is Middle English feithful, formed from English faith + -ful.[2][3]

Earliest recorded meaning

Full of faith; sincerely religious, especially Christian: before 1300 in the OED, the early 14th century in Etymonline.[4][2]

Semantic evolution

Firm in fidelity to a lord, friend or spouse is also from before 1300 (the mid-14th century in Etymonline),[4][2] and conscientious in duty from about 1350.[4] True to one's word is from about 1400.[4] Of a tale or report, accurate, reliable, it is from the late 14th century,[2] as is the noun, a true believer;[2] Church Latin used fideles in the same sense.[2] A native word for it was truefast, Old English trēowfæst.[2] Old Faithful, the American geyser, was named in 1870 by Henry Dana Washburn for the regularity of its eruptions.[2] In East Anglia it was used of telling an unpleasant truth, after Proverbs 27:6.[5]

Timeline

  • before 1300 – full of faith; loyal.[4]
  • c. 1350 – conscientious.[4]
  • late 14th century – accurate; a believer (noun).[2]
  • 1870 – Old Faithful.[2]

Modern meaning

Adjective

  1. Loyal and constant to a person, cause or idea.
  2. Having or full of faith.
  3. Sexually loyal to a partner.
  4. Reliable or trustworthy.
  5. Accurate in detail: a faithful translation.

Noun

  1. (the faithful) The believers of a religion, or loyal supporters of a cause.

Word family

  • faithfully
  • faithfulness
  • overfaithful
  • unfaithful
  • faith
  • faithless
  • fidelity

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  3. ^ Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  4. ^ a b c d e f Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
  5. ^ Wright, Joseph, ed. (1898–1905), The English Dialect Dictionary, 6 vols., Oxford: Henry Frowde; via EDD Online 4.0, University of Innsbruck (CC BY 4.0)
Cite this entry

“Faithful.” Etymologically, 16 Oct. 2026, etymologically.com/en/faithful. Accessed 16 Oct. 2026.

Last edited on . ·