arduous

adjective/ˈɑrdʒuəs/

Frequency rank: #10,810 most common English word

Meaning

Involving or requiring strenuous effort; difficult and tiring.

Illustration for the English word “arduous”

Example sentence

The climbers trained for months before attempting the arduous trek to the summit.

Synonyms & related words

Practice this word in the quiz

More words in ranks 10,801–10,900