arduous backbreaking grueling gruelling hard heavy laborious operose punishing toilsome
arduous%5:00:00:effortful:00 backbreaking%5:00:00:effortful:00 grueling%5:00:00:effortful:00 gruelling%5:00:00:effortful:00 hard%5:00:01:effortful:00 heavy%5:00:00:effortful:00 laborious%5:00:00:effortful:00 operose%5:00:00:effortful:00 punishing%5:00:00:effortful:00 toilsome%5:00:00:effortful:00
delaven mučen naporen priden tegoben težaven trnast
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