Dictionary and Thesaurus

Definition of Arduous

• (a.) Steep and lofty, in a literal sense; hard to climb.
• (a.) Attended with great labor, like the ascending of acclivities; difficult; laborious; as, an arduous employment, task, or enterprise.

Synonyms of Arduous

• Backbreaking
• Grueling
• Gruelling
• Hard
• Heavy
• Laborious
• Operose
• Punishing
• Toilsome
• Straining
• Strenuous

Antonyms of Arduous

Homophones of Arduous