Etymologically

fault

Etymology and origin of the English word fault

Confidence
Established
Formation
Borrowing
First attested
c. 1280
Borrowed from
Old French faute via Middle English
Ultimate origin
Latin (fallere)

Pronunciation

  • IPA: /fɔːlt/, /fɒlt/[1]

Etymology

It is inherited from Middle English faute, faulte,[2][3] borrowed from Old French faute (“opening, gap; failure, flaw; lack, deficiency”), earlier falte,[4][2] from Vulgar Latin *fallita (“a shortcoming, falling”),[4][2][5] the noun use of the feminine of *fallitus, which replaced Latin falsus as the past participle of fallere (“to deceive, disappoint”).[2][3][6] The -l- was restored in the 15th and 16th centuries in imitation of Latin,[4][2] but was silent until the 18th century: in Pope and Swift fault rhymes with thought, and Johnson (1755) said the l was not heard in conversation.[4][2] It is related to fail, false and default.[6][7]

Earliest recorded meaning

“Deficiency, lack, scarcity”: about 1280 in Barnhart,[2] before 1300 in the OED[8] and the late 13th century in Etymonline.[4]

Semantic evolution

A physical defect or imperfection is from the early 14th century,[4][2] about 1320 in the OED,[8] and moral culpability, milder than sin or vice but more serious than an error, from the late 14th century.[4][8] The tennis fault (about 1600) is closer to the root sense.[4] To a fault, to excess, is from 1752.[8] The geological sense, a break in rock strata, is from 1796.[4][6] The verb, “to be deficient”, is Scottish, about 1375,[2][4] and “to find fault with, blame” is from about 1450.[2][4] Faulty is from about 1380.[2] In Scottish, Irish and English dialect, faut was still common.[9]

Timeline

  • c. 1280 – lack, deficiency.[2]
  • c. 1320 – a defect.[8]
  • c. 1375 – verb, to be lacking.[2]
  • late 14th century – moral culpability.[4][8]
  • c. 1450 – verb, to blame.[2][4]
  • c. 1600 – in tennis.[4]
  • 1796 – in geology.[4]

Modern meaning

Noun

  1. A weakness of character, especially a minor one.
  2. A defect or imperfection; a flaw.
  3. A mistake or error; a minor offence.
  4. Responsibility for a mistake or offence; blame: it's my fault.
  5. In geology, a fracture in rock along which one side has moved relative to the other.
  6. In tennis and similar games, a serve that is not good.
  7. In electricity, a defect in a circuit.

Verb

  1. To find fault with; to criticize or blame.
  2. To produce a fault in, or to shift so as to produce one.

Word family

  • faultfinder
  • faultfinding
  • faultless
  • fault-tolerant
  • faulty
  • footfault
  • no-fault
  • postfault

Usage notes

The American Heritage distinguishes fault, a trait that detracts from moral excellence, from failing, weakness, frailty, foible, vice, blame and blemish.[10]

References

  1. ^ Jones, Daniel (2011), Cambridge English Pronouncing Dictionary, 18th ed., ed. Peter Roach, Jane Setter and John Esling, Cambridge: Cambridge University Press
  2. ^ a b c d e f g h i j k l m n Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
  3. ^ a b Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  4. ^ a b c d e f g h i j k l m n o Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  5. ^ The American Heritage Dictionary of the English Language (2000), 4th ed., Boston: Houghton Mifflin
  6. ^ a b c Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
  7. ^ Cresswell, Julia (2021), Oxford Dictionary of Word Origins, 3rd ed., Oxford: Oxford University Press
  8. ^ a b c d e f Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
  9. ^ 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)
  10. ^ The American Heritage Dictionary of the English Language (1992), 3rd ed., Boston: Houghton Mifflin

Related etymologies

Cite this entry

“Fault.” Etymologically, 15 Oct. 2026, etymologically.com/en/fault. Accessed 15 Oct. 2026.

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