Etymologically
Log in

investigator

This is the current revision of this entry, as edited by bogdan on 22 October 2026 at 21:08. This address is a permanent link to this version.
Changes in this edit History

Pronunciation

  • UK: /ɪnˈvɛs.tɪˌɡeɪ̯.təː/[1]

Etymology

It is borrowed from Latin investīgātor (“one who searches into something”),[2][3][4] the agent noun of investīgō (“to track down, search out”), from in- (“in, into”) and vestīgō (“to track”), from vestīgium (“footprint, track”).[5][6][2] Etymonline also allows that it was formed in English from investigate.[6] The OED compares Middle French investigateur, Spanish investigador and Italian investigatore.[2]

Earliest recorded meaning

A person or thing that investigates: 1538, in Thomas Elyot's Dictionary.[2][7] Etymonline dates it to the 1550s.[6]

Semantic evolution

Webster in 1828 defined it simply as one who searches diligently into a subject.[8] The sense of a person charged with a formal inquiry into a crime, an allegation or someone's conduct is recorded from 1845, in The Times;[2] the American Heritage Dictionary names the detective as the typical investigator.[5] In current use the general sense especially means a scientific or academic researcher.[2]

Timeline

  • 1538 – one who investigates, in Elyot's Dictionary.[2]
  • 1550s – Etymonline's date.[6]
  • 1828 – Webster: one who searches diligently into a subject.[8]
  • 1845 – a person conducting a formal inquiry into a crime or allegation.[2]

Modern meaning

Noun

  1. A person who looks into something systematically, especially a detective or official inquiring into a crime or allegation.
  2. A researcher who carries out scientific or academic studies.
  3. Someone employed to check insurance claims, or the background of a job applicant.

Word family

  • investigatorial
  • private investigator

References

  1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
  4. ^ Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  5. ^ a b The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
  6. ^ a b c d Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  7. ^ Kay, Christian; Roberts, Jane; Samuels, Michael; Wotherspoon, Irené, eds. (2009), Historical Thesaurus of the Oxford English Dictionary, Oxford: Oxford University Press; online edition (2024)
  8. ^ a b Webster, Noah (1828), An American Dictionary of the English Language, New York: S. Converse