untrustworthy

adjective

un·​trust·​wor·​thy ˌən-ˈtrəst-ˌwər-t͟hē 

: 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

The advanced flow is intentionally more difficult to use on the first try and is designed to discourage users from downloading apps from untrustworthy sources. — James Peckham, PC Magazine, 19 Aug. 2026

Lawyers representing Elon Musk, who sued OpenAI, Altman and Brockman in 2024 over a dispute about the company's corporate structure, used Altman's firing as a way to cast doubt on his character, accusing him of being untrustworthy. — Ashley Capoot,kate Rooney, CNBC, 14 Aug. 2026

The forest of myth was an eerie, volatile place, a shelter for untrustworthy and unpredictable characters who might eat you as soon as look at you. — Literary Hub, 30 July 2026

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

Word History

First Known Use

circa 1846, in the meaning defined above

Rhymes for untrustworthy

• creditworthy
• blameworthy
• newsworthy
• noteworthy
• praiseworthy
• trustworthy
• unworthy
• worthy