Antonyms of adv improperly

1 sense of improperly

Sense 1
improperly -- (in an improper way; "he checked whether the wound had healed improperly")
       Antonym of properly (Sense 1)
      => properly, decently, decent, in good order, right, the right way -- (in the right manner; "please do your job properly!"; "can't you carry me decent?")

Synonyms of adv improperly

1 sense of improperly

Sense 1
improperly -- (in an improper way; "he checked whether the wound had healed improperly")