un·​re·​li·​able | \ ˌən-ri-ˈlī-ə-bəl How to pronounce unreliable (audio) \

Definition of unreliable

: not reliable : undependable, untrustworthy an unreliable friend an unreliable source of funding an unreliable car

Other Words from unreliable

unreliability \ ˌən-​ri-​ˌlī-​ə-​ˈbi-​lə-​tē How to pronounce unreliable (audio) \ noun
the unreliability of the data a person with a reputation for unreliability
unreliably \ ˌən-​ri-​ˈlī-​ə-​blē How to pronounce unreliable (audio) \ adverb
a method that works unreliably

Examples of unreliable in a Sentence

Recent Examples on the Web The study received a good amount of criticism: for example, since only female names were used before 1979—and prediction and preparedness were almost certainly poorer in the past—the results of the archival analysis might be unreliable. Rivka Galchen, The New Yorker, 8 Aug. 2022 The Botometer tool is unreliable, Twitter said in its filing. New York Times, 4 Aug. 2022 The lawsuit claims that the electronic ballot scanners that count votes in Alabama elections are unreliable because they can be connected to the Internet and tampered with. Mike Cason | Mcason@al.com, al, 2 Aug. 2022 However, like most markets, these predictions are often unreliable, resulting in a failure to meet demand or overbooking costs. Dorothy Li, Forbes, 1 Aug. 2022 Some people remain unaccounted for in a region of Kentucky where cell service and electricity have been unreliable following the floods. Kyle Bagenstose, USA TODAY, 30 July 2022 Cadaver dogs used in the search are unreliable, Sanger said, and the profession itself is not regulated. Fox News, 19 July 2022 According to historians at the Library of Virginia, Richardson insisted that some of the accounts of slavery and its brutality were unreliable. David A. Taylor, Washington Post, 19 July 2022 Textbooks still link inflation to the money supply, but financial innovation and regulatory changes have made the link between money and spending too unreliable to be useful. Greg Ip, WSJ, 15 June 2022 See More

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

First Known Use of unreliable

1810, in the meaning defined above

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The first known use of unreliable was in 1810

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Last Updated

10 Aug 2022

Cite this Entry

“Unreliable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unreliable. Accessed 12 Aug. 2022.

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More Definitions for unreliable


un·​re·​li·​able | \ ˌən-ri-ˈlī-ə-bəl \

Kids Definition of unreliable

: not worthy of trust He got rid of his unreliable car.


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