Synonyms for badly

modified

1. In an ineffectual or incompetent manner

   wrongly, imperfectly, ineffectively, inefficiently, poorly, unsatisfactorily, crudely, boorishly, unskillfully, defectively, weakly, haphazardly, clumsily, carelessly, negligently, incompetently, stupidly, blunderingly, mistakenly, bunglingly, awkwardly, maladroitly, unhandily, faultily, amiss, abominably, awfully, terribly.

   Antonyms carefully*, competently, adequately.

2. To a marked degree

   severely, seriously, greatly; see very.

3. *Sorry

   bad, sorry, distressed; see sad 1, sorry.