heavy
Herculean
annoying
arduous
backbreaking
besetting
bothersome
crushing
cumbersome
cumbrous
demanding
distressing
effortful
encumbering
exacting
exhausting
exigent
forced
grievous
grinding
grueling
hampering
hard-earned
hard-fought
harsh
hefty
impedimental
impeding
impeditive
incumbent
irksome
killing
labored
laborious
lumpish
massive
onerous
operose
oppressive
overburdensome
painful
plaguey
burden
Embarrass
debilitate
disagreeable
hazardous
hurtful
impracticable
inconvenient
injurious
restrictive
stringent
time-consuming
troublesome
unpopular
unproductive
vexatious
wearisome