Synonyms and related words :
aggravating, aggravative, backbreaking, besetting, bothering, bothersome, burdensome, chafing, contentious, crushing, disquieting, distressful, distressing, disturbing, exasperating, exasperative, fretting, galling, grueling, harassing, heavy, hefty, importunate, importune, irking, irksome, irritating, onerous, oppressive, painful, pesky, pestering, pestiferous, pestilent, pestilential, plaguesome, plaguey, plaguing, provocative, provoking, teasing, tiresome, tormenting, troublesome, troubling, trying, upsetting, vexatious, vexing, wearisome, worrisome, worrying,