Synonyms to without regret

unashamedly, abominably, agonizingly, awfully, baldly, balefully, bitterly, blatantly, brashly, confoundedly, cruelly, damnably, deadly, deathly, deucedly, distressingly, dolorously, dreadfully, egregiously, excessively, excruciatingly, exorbitantly, extravagantly, flagrantly, frightfully, grievously, hellishly, horribly, impenitently, improperly, inexcusably, infernally, inordinately, intolerably, lamentably, miserably, nakedly, openly, painfully, piteously, remorselessly, sadly, shamelessly, shatteringly, shockingly, something awful, something fierce, sorely, sorrowlessly, staggeringly, terribly, torturously, unbearably, unconscionably, unduly, unpardonably, unregretfully, unremorsefully, unruefully, without any qualms, without compunction, without looking back, without remorse, woefully