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Đồng nghĩa
laborious
US
UK
adjective
Few realize how laborious farm work can be
arduous
burdensome
onerous
strenuous
gruelling
back-breaking
Herculean
exhausting
taxing
tiring
fatiguing
wearying
wearisome
toilsome
difficult
tough
hard
uphill
stiff
After laborious research the virus was finally identified
painstaking
detailed
careful
thorough
diligent
scrupulous
exhaustive
steady
steadfast
relentless
unrelenting
dogged
assiduous
sedulous
persevering
persistent
untiring
tireless
indefatigable
unremitting
He made a laborious effort to get ahead
industrious
hard-working
dogged
determined
unwavering
obstinate
stubborn
unflagging
obdurate
The book contains some of the most laborious prose ever written
laboured
strained
forced
ponderous
overworked
US