(a.) Vexatious; causing bother; causing trouble or perplexity; troublesome.

aggravating annoying backbreaking besetting bothering burdensome chafing crushing disquieting distressful distressing disturbing exasperating fretting galling grueling harassing heavy hefty importunate importune irking irksome irritating onerous oppressive painful pesky pestering pestiferous pestilent pestilential plaguesome plaguey plaguing provoking teasing tiresome tormenting troublesome troubling trying upsetting vexatious vexing wearisome worrisome worrying