Etymologically

ennui

Etymology and origin of the English word ennui

Formation
Borrowing
Borrowed from
French ennui

Pronunciation

  • IPA: /ɒnˈwiː/ (UK); /ɑnˈwi/ (US)[1]

Etymology

It is borrowed from French ennui (“boredom”),[2][3][4] from Old French enui (“annoyance”),[2][3][5][4] from Old French enuier (“to annoy, vex”),[2][3][5] from Late Latin *inodiāre (“to make odious”),[2][3] from the Latin phrase in odiō esse “to be hateful”.[2] It is thus a doublet of annoy.[4][6]

Earliest recorded meaning

Mental weariness and dissatisfaction from lack of occupation or interest (1667).[7][5][4]

Semantic evolution

The word was first used in English as a French word and was naturalized by 1758,[4] though, as the OED noted, its pronunciation was never anglicized.[4] Merriam-Webster and the American Heritage Dictionary date it to 1732.[3][2] A verb to ennui “to bore” is recorded from 1805.[7]

Timeline

  • 1667 – boredom, mental weariness.[7][5][4]
  • 1732 – first date given by Merriam-Webster and the American Heritage Dictionary.[3][2]
  • 1790 – a cause of ennui.[7]
  • 1805 – verb, to bore, weary.[7]

Modern meaning

Noun

  1. Listless weariness and dissatisfaction from lack of interest; boredom.

Verb

  1. To bore or weary.
  • annoy
  • odium

Usage notes

Random House lists listlessness, tedium, lassitude and languor as synonyms.[6]

References

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

Related etymologies

Cite this entry

“Ennui.” Etymologically, 15 Oct. 2026, etymologically.com/en/ennui. Accessed 15 Oct. 2026.

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