toilsome Synonyms

hard laborious heavy operose punishing backbreaking grueling gruelling arduous tight thorny taxing stressful strenuous severe profound rough rugged tiring drudgy back-breaking weighty wearying wearisome wearing wayworn uphill trying tricky tough toilful ponderous palestric formidable exhausting exacting elaborate difficult difficile demanding complicated complex challenging burdensome grave grievous grinding painful oppressive onerous