Longman Dictionary of Contemporary English - severely

~ adv 1 very badly or to a great degree  (a severely damaged building | severely disabled | His movements are severely restricted.) 2 in a strict way  (Parents don't punish their children so severely these days.) 3 in a way that shows you disapprove greatly  ("Stop behaving like a fool!" she said severely.) 4 in a plain simple style with little or no decoration  (severely dressed)