paintbrushEnglishMerriam-Webster Dictionaryiv>abruptly, presto, suddenly, unexpectedlyhastily, impetuously, impulsively, rashly, recklesslyexactly, opportunely, punctually, seasonablySynonymous Phrases at once, in no time, off the bat, on a dime, on the double, on the spotNear Antonyms slowlylate, tardily