undetected
adjective/ˌʌndɪˈtektɪd/
/ˌʌndɪˈtektɪd/
- not noticed by anyone
- How could anyone break into the palace undetected?
- The disease often goes/remains undetected for many years.
Check pronunciation:
undetected
Definition of undetected adjective from the Oxford Advanced Learner's Dictionary