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

Blind spots, poor image quality, and limited video retention undermine investigations and allow misconduct to go undetected or unprosecuted. —Walter Pavlo, Forbes.com, 27 Jan. 2026

When attackers get in through something as simple as a phishing email and stay undetected for days, the damage can spread fast. —Kurt Knutsson, FOXNews.com, 23 Jan. 2026

Some of this damage may go undetected until the ice thaws in spring and water begins to leak. —Louise Parks, Martha Stewart, 21 Jan. 2026

The gold shipment In the final episodes, Choudhary orchestrates the transport of two tons of gold in 40 coffins, expecting the shipment to pass undetected through customs. —Isabella Wandermurem, Time, 14 Jan. 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