arduous

adjective
UK: /ˈɑːdʒuəs/
US: /ˈɑːrdʒuəs/

  1. Involving a lot of effort and energy, especially over a period of time; difficult and tiring.

    1. Climbing the mountain was arduous. [ ] [ ]
    2. The arduous journey tested their endurance, but they persevered to reach their destination. [ ] [ ]

Synonyms

difficult hard laborious tiring strenuous challenging onerous taxing

Frequently Asked Questions

The phonetic transcription of "arduous" is /ˈɑːdʒuəs/ in British English and /ˈɑːrdʒuəs/ in American English. Click the 🔊 button to hear both pronunciations.

Synonyms for "arduous": difficult, hard, laborious, tiring, strenuous, challenging, onerous, taxing.

Example usage of "arduous": "Climbing the mountain was arduous.". More examples on the page.