backbreaking

同义词

• arduous
• burdensome
• demanding
• difficult
• effortful
• exacting
• exigent
• formidable
• hard
• heavy
• laborious
• onerous
• oppressive
• rigorous
• rough
• severe
• taxing
• tough
• trying
• weighty

• grueling
• gruelling
• operose
• punishing
• toilsome