Sisyphean
/ˌsɪsɪˈfiːən
/adjective
Denoting a task that can never be completed.It was a Sisyphean task - but Paul did not give in....
- Not only do they lose the game but they are sentenced to a Sisyphean task.
- It was a Sisyphean task of epic proportions that defied a normal life expectancy.
Origin
Late 16th century: from Latin Sisypheius (based on Greek Sisuphos: see Sisyphus) + -an.