unreliable

adjective

un·​re·​li·​able ˌən-ri-ˈlī-ə-bəl How to pronounce unreliable (audio)
: 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 About 12% of households in tribal areas have unreliable heat, compared to just 2% of households across the United States, according to a 2017 HUD study. Genevieve Redsten, Journal Sentinel, 31 July 2024 But the technology also constantly makes up information, making the tools unreliable in terms of accuracy. Gerrit De Vynck, Washington Post, 25 July 2024 When Linux took off in the late 90s and early 2000s many big tech companies were invested in closed alternatives and criticized open source software as risky and unreliable. Will Knight, WIRED, 23 July 2024 Tatum argued in his initial appeal that the in-court identifications were suggestive and unreliable. Edmund H. Mahony, Hartford Courant, 16 July 2024 See all Example Sentences for unreliable 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'unreliable.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1810, in the meaning defined above

Time Traveler
The first known use of unreliable was in 1810

Dictionary Entries Near unreliable

Cite this Entry

“Unreliable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unreliable. Accessed 18 Aug. 2024.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!