intensifying
aggravative
annoying
bothering
bothersome
contentious
disturbing
exasperating
exasperative
galling
harassing
importunate
importune
irking
irksome
irritating
pesky
pestering
pestiferous
pestilent
pestilential
plaguesome
plaguey
plaguing
provocative
provoking
teasing
tiresome
tormenting
troublesome
troubling
vexatious
vexing
wearisome
worrisome
worrying