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

This practice often reveals misinterpretations that would otherwise go undetected. —Anna Barnhill, Forbes.com, 17 June 2025

Safety risks may go undetected in animals, and the stress of laboratory life can affect their immune function and responses, a significant confounding factor in animal research that scientists have noted before. —Rachel Fobar, Vox, 14 May 2025

Meanwhile, investors risk seeing their property portfolios erode (literally) if termite activity is undetected or underestimated. —Jason Phillips, USA Today, 1 May 2025

These technologies can identify donors who are at a higher risk of carrying undetected mutations, lowering false-negative rates by up to 40% and enhancing overall efficiency. —William A. Haseltine, Forbes.com, 4 June 2025

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