This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. To observe or inquire into in detail; examine systematically.

verb-intransitive. To make a detailed inquiry or systematic examination.

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

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

v. To conduct an inquiry or examination.

v. To follow up step by step by patient inquiry or observation; to trace or track mentally; to search into; to inquire and examine into with care and accuracy; to find out by careful inquisition.

verb-intransitive. To pursue a course of investigation and study; to make investigation.

To search into or search out; inquire into; search or examine into the particulars of; examine in detail: as, to investigate the forces of nature; to investigate the causes of natural phenomena; to investigate the conduct of an agent.

Synonyms To scrutinize, overhaul, sift, probe into, explore, study.

v. investigate scientifically

v. conduct an inquiry or investigation of

"Yes the Kean Commission did "investigate" 9/11, and the word investigate is used in the loosest definition of the word."

investigated    investigates    investigating   

investigated    investigating   

examine    study    scrutinize    sift    search    overhaul    scrutate    research    perscrutate    indagate   

impeachable    investigatory    seven-member    silk-screened    fact-finding    greeuous    enquiring    drug-related    nonmilitary    negotiate