Etymologically

assure

Etymology and origin of the English word assure

Confidence
Established
Formation
Borrowing
First attested
c. 1375
Borrowed from
Old French aseürer via Middle English
Ultimate origin
Latin (securus)

Pronunciation

  • IPA: /əˈʃʊɹ/, /əˈʃɝ/ (US)[1]

Etymology

It is inherited from Middle English assuren, borrowed from Old French aseürer (“to reassure, render sure”), asseurer (modern French assurer),[2][3][4] from Vulgar Latin *assēcūrāre, from Latin ad-, to, and sēcūrus, safe (see secure).[2][3][5]

Earliest recorded meaning

To reassure or give confidence to, to make safe, and to pledge: about 1375, in Chaucer's Anelida and Arcite, in Barnhart, the late 14th century in Etymonline.[2][3]

Semantic evolution

To betroth (1393) and to make sure the possession of property (1572) are obsolete senses.[6] To make safe against risks, to insure, is from about 1385,[6] now especially of life insurance in Britain.[6][7] To render safe or secure from attack is from 1413,[6] and to make an event certain, to ensure, from 1622.[6] Assurance is from about 1385, in Chaucer.[2]

Timeline

  • c. 1375 – to reassure.[2]
  • c. 1385 – to insure.[6]
  • 1393 – to betroth.[6]
  • 1413 – to make safe.[6]
  • 1622 – to ensure.[6]

Modern meaning

Verb

  1. To tell positively so as to remove doubt.
  2. To make someone feel sure; to convince or reassure.
  3. To make certain; to ensure.
  4. (chiefly British) To insure, especially a life.

Word family

  • assurable
  • assurer

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
  3. ^ a b c Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
  5. ^ Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  6. ^ a b c d e f g h i Simpson, J. A.; Weiner, E. S. C., eds. (1989), The Oxford English Dictionary, 2nd ed., Oxford: Clarendon Press
  7. ^ Collins English Dictionary (2023), Glasgow: HarperCollins

Related etymologies

Cite this entry

“Assure.” Etymologically, 17 Oct. 2026, etymologically.com/en/assure. Accessed 17 Oct. 2026.

Last edited on . ·