flawlessly

without any flaws or errors flawlessly recited the first 100 digits of pi Synonyms faultlessly, perfectly, ideally, immaculately, impeccably, patRelated Words excellently, fabulously, finely, grandly, greatly, marvelously, superbly, superiorly, superlatively, terrifically; exceptionally, fancily, speciallyNear Antonyms deficiently, inadequately, incompletely, insufficiently; fallibly; atrociously, execrably, wretchedlyAntonyms amiss, badly, defectively, faultily, imperfectly