investigation

Etymology

From Middle English investigacioun, from Old French investigacion, from Latin investigatio. Morphologically investigate + -ion

noun

1. The act of investigating; the process of inquiring into or following up; research, especially patient or thorough inquiry or examination
   The investigation into the crime has led to various leads as well as plenty of dead ends.
   Despite thorough investigation, the perpetrator of the attacks remains unknown.
   carry out an investigation
   the matter is awaiting investigation
   The case is still under investigation.