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многотрудный adj.contraintes
Gruzovik toilsome; very arduous; very difficult
génér. formidable; laborious (medfly); difficult (MichaelBurov); very much difficult (MichaelBurov); operose
Gruzovik, obsol. formidable
peu fr. tiresome (Баян); arduous (Супру)
многотрудно adj.
génér. drudgingly
obsol. operosely