Sisyphean
adjective/ˌsɪsɪˈfiːən/
/ˌsɪsɪˈfiːən/
- (of a task) impossible to completeWord OriginFrom the Greek myth in which Sisyphus was punished for the bad things he had done in his life with the never-ending task of rolling a large stone to the top of a hill, from which it always rolled down again.
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Sisyphean