extensively
adv. manner B2 Upper Intermediate Oxford US //ɪkˈstɛnsɪvɫi// UK //ɛkstˈɛnsɪvli// ex·ten·sive·ly
adv. in a way that covers a lot of information, space, or detail. You use this when something is done very thoroughly or over a large area.
adv. to a great or wide-ranging degree; covering a large area or a vast amount of detail.
The police searched the building extensively for clues.
The author traveled extensively across South America to research her latest historical novel.
The legal team reviewed the documents extensively before the trial, ensuring that every piece of evidence was cross-referenced with the witness statements.
From extensive + -ly.
Usage
Typically follows the verb it modifies or sits at the end of the clause.