arduous, backbreaking, grueling, gruelling, hard, heavy, laborious, operose, punishing, toilsome
Meaning: 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"
This seems to us laborious and rather tiresome, both for father and child.
The most menial, and even laborious offices, are therefore left to these poor drudges.
This, however, relieved his thirst; an hour's repose recruited his hardy frame, and, with the indomitable spirit of avarice, he resumed his laborious journey.
In the reign of Caliph Haroon al Rusheed, there was at Bagdad, a porter, who, notwithstanding his mean and laborious business, was a fellow of wit and good humour.
He had more company the second than the first night, and will make, I believe, a good figure in the whole, though his faults seem to be very many; some of natural deficience, and some of laborious affectation.
This property thus destroyed had been accumulated and constructed with laborious care and skillful ingenuity during a course of years to fulfill one of the objects of the Constitution, which was expressed in these words, "To provide for the common defense" (see Preamble of the Constitution).