1 : dried out; "hard dry rolls left over from the day before"
2 : 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"
adjectif
1 : resisting weight or pressure
2 : dispassionate;
3 : not easy; requiring great physical or mental effort to accomplish or comprehend or endure
