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
Keep in mind that cell service is unreliable in parts of the park, so going in with a plan—and a backup plan—will serve you well.
—
Maryam Siddiqi, Travel + Leisure, 23 May 2026
Edward Fishman’s Chokepoints explains how the US came to rely on its economic arsenal, but stops short of a complete assessment of the unreliable tactic and its often devastating consequences.
—The New York Review of Books, 23 May 2026
Basic services have become unreliable.
—Adam Miller, Daily News, 23 May 2026
That does not mean background screening is inaccurate or unreliable.
—Alonzo Martinez, Forbes.com, 22 May 2026
See All Example Sentences for unreliable
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Maryam Siddiqi, Travel + Leisure, 23 May 2026
Edward Fishman’s Chokepoints explains how the US came to rely on its economic arsenal, but stops short of a complete assessment of the unreliable tactic and its often devastating consequences.
—The New York Review of Books, 23 May 2026
Basic services have become unreliable.
—Adam Miller, Daily News, 23 May 2026
That does not mean background screening is inaccurate or unreliable.
—Alonzo Martinez, Forbes.com, 22 May 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 29 May. 2026.
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