laborious Synonyms

toilsome heavy gruelling hard punishing backbreaking grueling operose arduous strained toilful rough tiring ticklish thorny rugged testing sedulous severe stiff stilted strenuous taxing tough tricky time-consuming tensional worksome back-breaking hard-working laboured labour-intensive labor-intensive troublesome wearying wearisome upstream uphill trying wearing wakeless problematic fatiguing exhausting exacting drudgery diligent difficult difficile demanding