| adj. |
| [1] |
laborious
,
backbreaking
,
grueling
,
difficult
,
hard
,
tough
,
strenuous
,
heavy
,
onerous
,
burdensome
,
operose
,
punishing
,
back-breaking
,
painful
,
toilsome
,
(Formal) operose
,
tiring
,
exhausting
,
wearisome
,
fatiguing
,
taxing
,
gruelling
,
trying
,
formidable
|
| [2] |
energetic
,
straining
,
strenuous
,
vigorous
|
|
