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investigate

verbcommon in dialogue

  • United States/[ɪnˈvɛs.tɪ.ɡeɪ̯t]/
  • United States/[ɪnˈvɛs.tə.ɡeɪ̯ʔ]/
  • //ɪnˈvɛs.tə.ɡeɪt//

To inquire into or study in order to ascertain facts or information.

verb

  1. 1

    To inquire into or study in order to ascertain facts or information.

    to investigate the causes of natural phenomena

    He was asked to investigate a robbery.

    We investigated the presence of CNM in ornithophagous ticks from migrating birds.

    The current study investigates autoantibodies against steroid synthesis enzymes in dogs with spontaneous hypoadrenocorticism.

  2. 2

    To examine, look into, or scrutinize in order to discover something hidden or secret.

    to investigate an unsolved murder

  3. 3

    To conduct an inquiry or examination.

    "Why don't you investigate?" he demanded. And investigate I did.

Etymology

Recorded since circa 1510, a back-formation from investigation on the basis of -ate (verb-forming suffix), from Latin investīgātiō (“a searching into”), from investīgātus, the perfect passive participle of investīgō, equivalent to in- + vestigate. Displaced native Old English undersēċan (literally “to search under or between”).

Forms

past tense
investigated
past participle
investigated
present participle
investigating
third person singular
investigates
The neighbouring pagesAlphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.

Lexical content from Wiktionary, under CC BY-SA 4.0 · Source entry · Data version 2026-08-23

Rank among the words of the OpenSubtitles 2018 corpus — film and television subtitles, so spoken rather than written usage (CC BY-SA 3.0).