laborious Synonyms

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