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сизифов труд stresses
gen.	Sisyphean labour; Sisyphean task; the task of Sisyphus; labour of Sisyphus (Anglophile); a labour of Sisyphus; Sisypean toil; Sisyphean labors; the labors of Sisyphus
idiom.	fool's errand (SirReal); wild-goose chase (Taras)
Makarov.	Sisyphian labour; Sisyphian task
Сизифов труд
gen.	uphill battle (VLZ_58)
myth.	Sisyphean toil (according to Greek mythology, Sisyphus, king of Corinth, was condemned in Tartarus to roll ceaselessly a huge stone up the hill Olga Okuneva)