Synonyms to mischievously

badly, afield, amiss, astray, atrociously, awfully, awry, carelessly, critically, cruelly, damagingly, dangerously, defectively, deficiently, distressfully, dreadfully, emotionally, erroneously, faultily, gravely, greatly, grievously, hard, hardly, harshly, horribly, improperly, inaccurately, inadequately, inartistically, incorrectly, ineptly, insufficiently, painfully, poorly, roughly, seriously, severely, shamefully, shoddily, unacceptably, unfavorably, unfortunately, unkindly, unluckily, unsatisfactorily, unspeakably, unsuccessfully, very much, viciously, vigorously, villainously, wickedly, wretchedly, wrong, harmfully, balefully, banefully, corrodingly, corrosively, counterproductively, deleteriously, detrimentally, disadvantageously, disserviceably, hatefully, hurtfully, in spite, iniquitously, injuriously, invidiously, malefically, maleficently, malevolently, maliciously, malignantly, malignly, meanly, nastily, noisomely, noxiously, ornerily, poisonously, prejudicially, spitefully, toxically, venomously, virulently, with bad intent,