Extensively

To a large degree; covering a wide area or range; in great detail over a broad scope.

From 'extensive' plus '-ly', where 'extensive' comes from Late Latin 'extensivus', derived from Latin 'extensus' (stretched out), past participle of 'extendere'. The Latin combines 'ex-' (out) with 'tendere' (to stretch), literally meaning 'stretched outward'.