badly

to a severe or serious degree

“fingers so badly frozen they had to be amputated”

“badly injured”

“a severely impaired heart”

“is gravely ill”

(‘ill’ is often used as a combining form) in a poor or improper or unsatisfactory manner; not well

“he was ill prepared”

“it ill befits a man to betray old friends”

“the car runs badly”

“he performed badly on the exam”

evilly or wickedly

“treated his parents badly”

“to steal is to act badly”

in a disobedient or naughty way

“he behaved badly in school”

“he mischievously looked for a chance to embarrass his sister”

“behaved naughtily when they had guests and was sent to his room”

with great intensity (‘bad’ is a nonstandard variant for ‘badly’)

“the injury hurt badly”

“the buildings were badly shaken”

“it hurts bad”

“we need water bad”

very much; strongly

“I wanted it badly enough to work hard for it”

“the cables had sagged badly”

“they were badly in need of help”

“he wants a bicycle so bad he can taste it”