say it: in-VEH-stuh-gayt
investigate is a verb meaning "investigate scientifically". It is pronounced /ˌɪnˈvɛstəˌɡeɪt/ — in-VEH-stuh-gayt. It carries 2 recorded senses.
“The district attorney's office investigated reports of possible irregularities”
“inquire into the disappearance of the rich old lady”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for investigate come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.