tire·​less | \ ˈtī(-ə)r-ləs How to pronounce tireless (audio) \

Definition of tireless

: seemingly incapable of tiring : indefatigable a tireless worker

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Other Words from tireless

tirelessly adverb
tirelessness noun

Examples of tireless in a Sentence

She has been a tireless advocate for reform. a tireless advocate for human rights
Recent Examples on the Web Aston Villa talisman John McGinn has claimed Liverpool's victory at Villa Park came because of their tireless work ethic. SI.com, "Aston Villa Star John McGinn Hails 'Relentless' Liverpool Following Late Defeat," 4 Nov. 2019 Same Kind of Different as Me was based on the bestselling book by Dallas businessman Ron Hall, who became a tireless advocate for the homeless. Michael Granberry, Dallas News, "Yes, Twitterites, Renée Zellweger speaks with a Texas accent, because guess what — she’s from Texas!," 6 Jan. 2020 We are left in no doubt as to Sorrentino’s tireless commitment to transgression. Philippa Snow, The New Republic, "The New Pope’s Tireless Commitment to Transgression," 23 Jan. 2020 None of that came as a surprise to his CORE CEO Ann Lee, who talked about his tireless commitment in her remarks as well as his often unconventional approach. Chris Gardner, The Hollywood Reporter, "Sean Penn Reveals Feature Documentary About Haitian Relief Efforts by Filmmaker Don Hardy," 16 Jan. 2020 How does this sound: Build the All-Star weekend around his legacy — particularly his tireless devotion to globalization and the professional women’s game. Bruce Jenkins, SFChronicle.com, "How to preserve David Stern’s legacy? Remodel All-Star weekend in his spirit," 4 Jan. 2020 From his vicious 1989 rant against the Central Park Five to his slander of a Mexican American judge to his Muslim travel ban, Trump has been a tireless peddler of hate. Steve Chapman, chicagotribune.com, "Column: Trump’s 3 obsessions: Tariffs, bigotry and Putin," 4 Dec. 2019 Glenn Segal, science teacher at Cockeysville Middle, is the tireless force behind the chess tournament, which is now in its ninth year. Melissa Whatley, baltimoresun.com, "Hunt Valley Rotary Club promotes truth, fairness, goodwill among students," 16 May 2018 Acknowledge the vision of longtime executive Donnie Nelson, who escaped so brilliantly from his father’s shadow by paying such tireless attention to Nowitzki, Marciulionis, Steve Nash and Doncic in the early years. Bruce Jenkins, SFChronicle.com, "How to preserve David Stern’s legacy? Remodel All-Star weekend in his spirit," 4 Jan. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'tireless.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of tireless

1591, in the meaning defined above

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Time Traveler for tireless

Time Traveler

The first known use of tireless was in 1591

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Statistics for tireless

Last Updated

23 Feb 2020

Cite this Entry

“Tireless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tireless. Accessed 28 Feb. 2020.

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More Definitions for tireless


How to pronounce tireless (audio)

English Language Learners Definition of tireless

: working very hard with a lot of energy for a long time : never seeming to get tired


tire·​less | \ ˈtīr-ləs How to pronounce tireless (audio) \

Kids Definition of tireless

: able to work or persist a long time without becoming tired

Other Words from tireless

tirelessly adverb

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