I was puzzled by your remark, 'roll, rinse, repeat',at the end of your explanation of the etymology of 'sisyphean'. Do you mean to suggest that the boulder which Sisyphus was condemned eternally to roll up to the mountaintop fell into a river or lake? I'm not able to find any material that supports such a view. Perhaps you'll explain!

Albert Camus wrote a limpid and moving essay - The Myth of Sisyphus - in which he compares man's eternal and, in his view, futile search for meaning to the task that the mythical king was compelled to perform for all eternity. He concludes by saying that life is itself the end: 'One must imagine Sisyphus happy'.