(p. pr. & vb. n.) of Irritate.

acerbic acid acrid aggravating aggravative annoying asperous astringent biting bitter bothering bothersome caustic chafing contentious cutting disturbing escharotic exasperating exasperative fretting galling grating grinding harassing harsh importunate importune irking irksome irritant irritative keen mordant nose-tickling penetrating pesky pestering pestiferous pestilent pestilential piercing piquant plaguesome plaguey plaguing poignant provocative provoking pungent rasping rough scratchy severe sharp sour stinging teasing tiresome tormenting trenchant troublesome troubling vexatious vexing vitriolic wearisome worrisome worrying