Englishfor English speakers
arduous
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adjective
(= grueling, gruelling, hard, heavy, laborious, punishing)
characterized by effort to the point of exhaustion; especially physical effort
worked their arduous way up the mining valley
a grueling campaign
hard labor
heavy work
heavy going
spent many laborious hours on the project
set a punishing pace
—
adjective
(= straining, strenuous)
taxing to the utmost; testing powers of endurance
his final, straining burst of speed
a strenuous task
your willingness after these six arduous days to remain here
— F.D.Roosevelt
—
adjective
difficult to accomplish; demanding considerable mental effort and skill
the arduous work of preparing a dictionary
conditions
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noun
the set of circumstances that affect someone's welfare
hazardous working conditions
harsh living conditions
—
noun
the prevailing context that influences the performance or the outcome of a process
there were wide variations in the conditions of observation
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noun
(= weather, weather condition, atmospheric condition)
the atmospheric conditions that comprise the state of the atmosphere in terms of temperature and wind and clouds and precipitation
they were hoping for good weather
every day we have weather conditions and yesterday was no exception
the conditions were too rainy for playing in the snow