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| uphill battle (VLZ_58) | |||
| 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) | |||
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| Sisyphean labour; Sisyphean task; the task of Sisyphus; labour of Sisyphus (Anglophile); a labour of Sisyphus; Sisypean toil; Sisyphean labors; the labors of Sisyphus | |||
| Sisyphian labour; Sisyphian task | |||
| fool's errand (SirReal); wild-goose chase (Taras) | |||