tireless

adjective/ˈtaɪərləs/

Frequency rank: #12,588 most common English word

Meaning

Having or showing great effort without becoming tired; never stopping.

Illustration for the English word “tireless”

Example sentence

The tireless researcher worked through the night to find a cure for the disease.

Synonyms & related words

Practice this word in the quiz

More words in ranks 12,501–12,600