Etymologically

interest

Etymology and origin of the English word interest

Confidence
Established
Formation
Borrowing
First attested
c. 1425
Borrowed from
Anglo-Norman interesse
Ultimate origin
Latin (interest)

Pronunciation

  • IPA: UK /ˈɪn.trəst/, US /ˈɪn.trɪst/[1]

Etymology

It is a Middle English alteration of earlier interesse,[2][3][4] borrowed from Anglo-Norman interesse, from Medieval Latin interesse (“compensation for loss; interest on money”),[2][5] from Latin interesse (“to be between; to concern, be of importance”),[6][7] from inter- (“between”) and esse (“to be”).[6][8] The final -t came partly as a parasitic sound and partly from interest (“damage, loss”),[8][4][9] itself a noun use of Latin interest (“it concerns, it makes a difference”).[6][10]

Earliest recorded meaning

A legal claim or right, a concern: about 1425,[2] or the mid-15th century.[6] The earlier form interesse is recorded about 1390, in Chaucer's Fortune.[2]

Semantic evolution

The first sense was a legal right or share, and an advantage or benefit.[6][10] A relation of being affected for good or ill is from before 1533,[11] and a thing in which one has a concern from 1618.[11] Money paid for the use of money lent is recorded from 1545;[10][12] Etymonline explains that Medieval Latin interesse was the compensation due from a debtor who defaulted, which allowed lenders to get round the Church's ban on usury.[6] The feeling of curiosity or concern about something is from the 18th century.[8] The verb “to cause to be interested” is from 1608,[3][11] earlier interesse (1560s).[6] Hoad notes that the history of the word is not clear in every detail.[8]

Timeline

  • c. 1390 – interesse, concern (Chaucer).[2]
  • c. 1425 – interest, a legal claim.[2]
  • 1545 – money paid on a loan.[10][12]
  • 1608 – verb, to involve.[3][11]
  • 1618 – a thing that concerns one.[11]
  • 18th century – curiosity or concern.[8]

Modern meaning

Noun

  1. A feeling of curiosity about or attention to something; something that arouses it.
  2. Advantage or benefit; self-interest.
  3. A right, claim or legal share in something; a stake in a business.
  4. A group with a common concern: business interests.
  5. A charge for borrowed money, generally a percentage of the amount borrowed.

Verb

  1. To arouse the curiosity or hold the attention of.
  2. To cause to become involved or concerned.

Word family

  • overinterest
  • self-interest
  • uninterest
  • reinterest
  • interested
  • interesting
  • conflict of interest
  • interest group
  • essence
  • entity
  • usury

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 Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
  3. ^ a b c Merriam-Webster's Collegiate Dictionary (2003), 11th ed., Springfield, Mass.: Merriam-Webster
  4. ^ a b Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  5. ^ Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  6. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  7. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
  8. ^ a b c d e Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
  9. ^ Soanes, Catherine; Stevenson, Angus, eds. (2004), Concise Oxford English Dictionary, 11th ed., Oxford: Oxford University Press
  10. ^ a b c d Cresswell, Julia (2021), Oxford Dictionary of Word Origins, 3rd ed., Oxford: Oxford University Press
  11. ^ a b c d e Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
  12. ^ a b Kay, Christian; Roberts, Jane; Samuels, Michael; Wotherspoon, Irené, eds. (2009), Historical Thesaurus of the Oxford English Dictionary, Oxford: Oxford University Press; online edition (2024)

Related etymologies

Cite this entry

“Interest.” Etymologically, 15 Oct. 2026, etymologically.com/en/interest. Accessed 15 Oct. 2026.

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