Origin: Latin suffix -ive
Investigative has 2 different meanings across 1 category:
designed to find information or ascertain facts
"a fact-finding committee"
"investigative reporting"
Of or pertaining to investigation
"The investigative team spent weeks reviewing security footage to identify the suspect."
In plain English: Investigative means showing that you are actively looking into something to find out what is happening.
"The investigative journalist spent months uncovering corruption in the city government."
The word investigative comes from combining the verb investigate with the suffix -ive to form an adjective describing something related to investigation. It entered English as a direct construction of these two parts rather than being borrowed from another language.