Synonyms for Tormentingly:

adv.

•aggravatingly (adverb)
teasingly, infuriatingly, disturbingly, gratingly, ranklingly, harassingly.
•painfully (adverb)
stingingly, uncomfortably, woefully, oppressively, sorely, disagreeably, unbearably, irksomely, horrendously, arduously, bitingly, miserably, witheringly, annoyingly, offensively, smartingly, aggravatingly, tryingly, torturously, bitterly, gnawingly, Insufferably, troublesomely, excruciatingly, agonizingly, grievously, piercingly, cruelly, gruelingly, odiously, painfully, distressingly, achingly, acutely, irritatingly, unpleasantly, distressfully, severely, hurtfully.
•threateningly (adverb)
admonishingly, Warningly, threateningly, frighteningly.

adv

•aggravatingly (adverb)
gratingly, irritatingly, troublesomely, infuriatingly, annoyingly, disturbingly, aggravatingly, harassingly, ranklingly, irksomely, teasingly.
•painfully (adverb)
stingingly, uncomfortably, woefully, oppressively, sorely, disagreeably, unbearably, irksomely, horrendously, arduously, bitingly, miserably, witheringly, annoyingly, offensively, smartingly, aggravatingly, tryingly, torturously, bitterly, gnawingly, Insufferably, troublesomely, excruciatingly, agonizingly, grievously, piercingly, cruelly, gruelingly, odiously, painfully, distressingly, achingly, acutely, irritatingly, unpleasantly, distressfully, severely, hurtfully.
•threateningly (adverb)
admonishingly, Warningly, threateningly, frighteningly.