sisific Adjective, sisific Sisyphean Appox. usage (any sense): 0.012 per million words Appox. usage (any sense): 0.012 per million words
sisifian Adjective, sisifian Sisyphean Appox. usage (any sense): less than 0.1 per million words Appox. usage (any sense): less than 0.1 per million words