Synonyms for arduous | Synonym.com

Synonyms for arduous

arduous (s.)

characterized by effort to the point of exhaustion; especially physical effort

Synonyms: Antonyms:

arduous (s.)

difficult to accomplish; demanding considerable mental effort and skill

Synonyms: Antonyms:

arduous (s.)

taxing to the utmost; testing powers of endurance

Synonyms: Antonyms: