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
Recent Examples on the Web
China is proving to be an unreliable friend to Iran in this moment of crisis, and any authoritarian regime that’s counting on Beijing as its backstop should think again.
—
Michael Schuman, The Atlantic, 16 Mar. 2026
About 600 million people across the continent still lack access to power and many more face unreliable supplies.
—ABC News, 16 Mar. 2026
The Highland Senior Center is concerned with its unreliable air conditioning system as a potentially record-breaking heat wave hits San Bernardino County.
—Zach Boetto, CBS News, 12 Mar. 2026
Jules is an unreliable narrator.
—Literary Hub, 12 Mar. 2026
See All Example Sentences for unreliable
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Michael Schuman, The Atlantic, 16 Mar. 2026
About 600 million people across the continent still lack access to power and many more face unreliable supplies.
—ABC News, 16 Mar. 2026
The Highland Senior Center is concerned with its unreliable air conditioning system as a potentially record-breaking heat wave hits San Bernardino County.
—Zach Boetto, CBS News, 12 Mar. 2026
Jules is an unreliable narrator.
—Literary Hub, 12 Mar. 2026
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 Mar. 2026.
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