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

According to an analysis by CBS affiliate WBBM-Ch. 2, 75% remain unserved in Cook County, meaning evidence in those cases is not available to prosecutors, law enforcement and other victims, and serial abusers go undetected. —Donna Miller, Chicago Tribune, 1 Aug. 2025

This can easily go undetected for a long period of time if you’ve been socialized to play the caretaker role. —Nicole Lipkin, Forbes.com, 31 July 2025

Women being dismissed by their healthcare providers is another culprit, says Tran, and without proper exams and X-rays, the disease goes undetected. —Marnie Goodfriend, Flow Space, 25 July 2025

Ten men escaped from the Orleans Parish Prison in the early hours of May 16, breaching a cell wall and using a blind spot to flee undetected. —Thao Nguyen, USA Today, 24 July 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