untrustworthy

adjective

un·​trust·​wor·​thy ˌən-ˈtrəst-ˌwər-t͟hē How to pronounce untrustworthy (audio)
Synonyms of untrustworthynext
: not dependable or worthy of confidence : not trustworthy
an untrustworthy person
an untrustworthy source

Examples of untrustworthy 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.
Indeed, El Niño’s complexity limited the researchers’ simulations to two years; beyond that, the model becomes untrustworthy. — Cody Cottier, Scientific American, 8 July 2026 The local gendarmerie, led by blandly untrustworthy Inspector Marchal (Bertrand Belin) is called in to investigate. — Jessica Kiang, Variety, 16 June 2026 There is evidence that this tendency, known as the endowment effect, was favored by natural selection when bargains were risky in a pre-modern world, a time when giving over one item, in trade for another, might risk getting nothing at all from an untrustworthy trading partner. — Owen D. Jones, The Conversation, 26 May 2026 The plaintiff’s counsel repeatedly questioned Altman’s character, accusing him of being untrustworthy, and of routinely lying. — Ashley Capoot,lora Kolodny, CNBC, 19 May 2026 See All Example Sentences for untrustworthy

Word History

First Known Use

circa 1846, in the meaning defined above

Time Traveler
The first known use of untrustworthy was circa 1846

Rhymes for untrustworthy

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Browse Nearby Words

untrustworthiness
untrustworthy
untrusty
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Cite this Entry

“Untrustworthy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/untrustworthy. Accessed 15 Jul. 2026.

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Thesaurus: All synonyms and antonyms for untrustworthy

Nglish: Translation of untrustworthy for Spanish Speakers

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