unreliable

adjective

un·​re·​li·​able ˌən-ri-ˈlī-ə-bəl How to pronounce unreliable (audio)
Synonyms of unreliablenext
: not reliable : undependable, untrustworthy
an unreliable friend
an unreliable source of funding
an unreliable car
unreliability noun
the unreliability of the data
a person with a reputation for unreliability
unreliably adverb
a method that works unreliably

Examples of unreliable in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Because we're deemed an unreliable supplier. Drew Hawkins, NPR, 25 Apr. 2026 The Ranger nameplate isn't particularly unreliable, though drivers with an impacted Ranger model should bring it in for inspection and repair as soon as possible to avoid any mishaps or issues. Saleen Martin, USA Today, 25 Apr. 2026 And now the model those dollars were built on is becoming unreliable. Kurt Knutsson, FOXNews.com, 25 Apr. 2026 The country has not published GDP data since 2024, and the widespread internet blackout has made domestic statistics (widely seen as unreliable) inaccessible outside the country. Anniek Bao,holly Ellyatt, CNBC, 23 Apr. 2026 See All Example Sentences for unreliable

Word History

First Known Use

1810, in the meaning defined above

Time Traveler
The first known use of unreliable was in 1810

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Cite this Entry

“Unreliable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unreliable. Accessed 26 Apr. 2026.

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