maliciously

basely behind one's back crookedly dishonestly dishonorably disloyally faithlessly falseheartedly malevolently perfidiously roguishly traitorously treacherously underhandedly unfaithfully unscrupulously

honestly truthfully

acerbically acrimoniously bitingly caustically sneeringly

brutally ferociously savagely wickedly

depravedly harmfully immorally reprehensibly spitefully wrongly

vengefully

brutally cruelly resentfully ruthlessly spitefully venomously