unreliable
adjective
un·re·li·able
ˌən-ri-ˈlī-ə-bəl 
: 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
Examples of unreliable in a Sentence
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This approach is unreliable because the proxy materials, like volcanic rock, might have been changed by geological processes or created long after the eggs were laid, resulting in incorrect age estimates.
—
Mrigakshi Dixit, Interesting Engineering, 11 Sep. 2025
Everyone knew taxis were an unreliable and largely unlovable service.
—David Malcolm, Forbes.com, 11 Sep. 2025
The latter approach, often based on mass scraping of the internet, is already producing American chatbots with false and unreliable results, including the parroting of Chinese Communist Party propaganda in response to consumer queries.
—Ruth Vitale, Deadline, 10 Sep. 2025
Aiding Ukraine has already begun to be a controversial subject in Poland; the prospect of Russian attacks in retaliation could drive up opposition, especially if the United States proves unreliable.
—Robert Kagan, The Atlantic, 10 Sep. 2025
See All Example Sentences for unreliable
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Mrigakshi Dixit, Interesting Engineering, 11 Sep. 2025
Everyone knew taxis were an unreliable and largely unlovable service.
—David Malcolm, Forbes.com, 11 Sep. 2025
The latter approach, often based on mass scraping of the internet, is already producing American chatbots with false and unreliable results, including the parroting of Chinese Communist Party propaganda in response to consumer queries.
—Ruth Vitale, Deadline, 10 Sep. 2025
Aiding Ukraine has already begun to be a controversial subject in Poland; the prospect of Russian attacks in retaliation could drive up opposition, especially if the United States proves unreliable.
—Robert Kagan, The Atlantic, 10 Sep. 2025
See All Example Sentences for unreliable
Cite this Entry
“Unreliable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unreliable. Accessed 17 Sep. 2025.
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