extensively
US /ɪkˈsten.sɪv.li/
UK /ɪkˈsten.sɪv.li/
1.
in a way that covers a large area or has a wide scope
:
•
The damage spread extensively throughout the building.
•
She traveled extensively during her gap year.
2.
to a great degree; very much
:
•
The new policy was extensively debated before being approved.
•
He has read extensively on the subject.