undetected

adjective

un·​de·​tect·​ed ˌən-di-ˈtek-təd 

-dē-

: not observed, noticed, or detected

an undetected flaw/error

an undetected illness

These rare mistakes are subtle and may go undetected for months and even years.

—Mario Salvadori

Examples of undetected in a Sentence

Recent Examples on the Web

Agents and casino staff alleged that Benward, who reportedly has described himself as a magician and illusionist, used a variety of techniques to mislead the workers, including multiple outfit changes and using different tellers to remain undetected. —William Morris, Des Moines Register, 11 Feb. 2026

Get it wrong, pick the wrong guy, and your deepest spiritual diseases will go not only untreated but undetected. —Will Gottsegen, The Atlantic, 11 Feb. 2026

For the most part, I was undetected until someone started putting my name out there. —Rebecca Jennings, Vulture, 11 Feb. 2026

Among them, however, is a mole chosen by production to sabotage these challenges while trying to stay undetected. —Kevin Jacobsen, Entertainment Weekly, 1 Feb. 2026

Word History

First Known Use

circa 1602, in the meaning defined above

Rhymes for undetected

• disaffected
• disconnected
• disinfected
• interjected
• intersected
• misdirected
• preselected
• recollected
• reconnected
• redirected
• reelected
• resurrected