arduous

Fetched 2026-10-26 (cache).

Synonyms: ardurous

Antonyms: ardurous

Related words from Datamuse; suggestions, not definitions.

Adjective

1. Needing or using up much [[energy]]; testing powers of [[endurance]].
2. {{lb|en|obsolete}} [[burning]]; [[ardent]]
3. [[difficult|Difficult]] or [[exhausting]] to [[traverse]].

Source: Wiktionary · CC BY-SA 4.0 (Wiktionary dump) · cached copy, not a rewrite.