Etymologically
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insurer

This is the current revision of this entry, as edited by bogdan on 31 October 2026 at 15:31. This address is a permanent link to this version.
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Pronunciation

  • UK: /ɪnˈʃʊ.ɹə/[1]
  • US: /ɪnˈʃʊɹ.ɚ/, /ɪnˈʃɝ.ɚ/[1]

Etymology

It is formed from English insure + -er.[2][3][4][5] The verb began in the mid 15th century as insuren, a spelling variant of ensuren (“to assure”),[3][2] from Anglo-Norman enseurer and Old French ensurer,[3][6] from en- (“make”) and seur (“safe, secure”), the source of sure.[3] The OED also notes the variant ensurer.[2]

Earliest recorded meaning

One who, for a premium, undertakes to make good another's loss: 1649, in H. Hammond's Christians Obligations.[2] Merriam-Webster dates the word to 1654, in the general sense,[4] and Dictionary.com to 1645–55.[5]

Semantic evolution

The commercial sense came first, in 1649; in 1654 the word was also used of anyone or anything that makes something sure or certain, a sense the OED calls now rare except as an extension of the commercial one.[2][4] From 1753 it could also mean the person who takes out insurance on a life or property, the insured, a use Merriam-Webster labels archaic.[2][4]

Timeline

  • 1649 – one who contracts to indemnify against loss.[2]
  • 1654 – one who makes sure or certain; a guarantor.[2][4]
  • 1753 – one who insures a life or property; the insured.[2]

Meanings

Noun

  1. A company or person that agrees to pay compensation for loss or damage in return for premiums; an insurance company or underwriter: The insurer refused to cover the flood damage.[7][4][2]
  2. (rare) A person or thing that makes something certain or secure; a guarantor.[4][2][7]
  3. (archaic) The person who is insured.[4][2]

Word family

  • coinsurer

Usage notes

Insure was at first a variant of ensure used in all its senses; the OED notes that it became the established form in the commercial sense.[2]

References

  1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ a b c d e f g h Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  5. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  6. ^ The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
  7. ^ a b Collins English Dictionary (2023), Glasgow: HarperCollins