great ‧ ly W3 /ˈɡreɪtli/ BrE AmE adverb formal
[ Word Family: noun : ↑ greatness , ↑ great ; adverb : ↑ greatly ; adjective : ↑ great ]
extremely or very much
greatly increased/reduced
The cost of repairs has greatly increased in recent years.
All offers of help will be greatly appreciated.
The quality of health care varies greatly.