undetected
UK: ˌʌndɪˈtektɪd | US: ˌʌndɪˈtektɪd
adj. not discovered or noticed
adj. remaining hidden or unnoticed
The word "undetected" combines the prefix "un-" (Old English "un-," meaning "not") with the verb "detect" (from Latin "detectus," past participle of "detegere," meaning "to uncover or reveal"). The suffix "-ed" turns it into an adjective, forming a term that literally means "not uncovered" or "not discovered." The logical progression reflects the idea of something escaping notice or remaining concealed.
The spy moved undetected through the crowded streets.
The virus can go undetected for weeks.
His clever disguise left him undetected by security.
Small errors in the code often remain undetected.
The submarine sailed undetected beneath the enemy radar.