extensively
UK: ɪkˈstɛnsɪvli | US: ɪkˈstɛnsɪvli
adv. covering a large area or range; thoroughly
adv. in a way that involves many details or aspects
The word "extensively" derives from the Latin root "extens-" (from "extendere," meaning "to stretch out"), combined with the adverbial suffix "-ly." The core idea of "stretching out" evolved metaphorically to imply breadth or thoroughness in scope. Over time, "extensive" came to describe something covering a wide range, and "-ly" transformed it into an adverb, emphasizing the manner of action.
The researcher studied the topic extensively before publishing the paper.
The fire spread extensively across the forest due to strong winds.
She traveled extensively throughout Europe last summer.
The book covers the history of the region extensively.
The team tested the software extensively to ensure reliability.