— Sisyphean
— arduous
— backbreaking
— difficult
— dragging
— effort
— effortless
— effortlessly
— effortlessness
— every day
— every other
— everyday
— everything
— exhausting
— grueling
— gruelling
— hard
— heavy
— labor-intensive
— labored
— laborious
— labour-intensive
— laboured
— leaden
— operose
— plodding
— punishing
— straining
— strenuous
— tiring
— toilsome
— wearing
— wearying