UNOBSERVED
Meaning of UNOBSERVED in English
/ ˌʌnəbˈzɜːvd; NAmE -ˈzɜːrvd/ adjective
without being seen :
It's not easy for somebody to get into the building unobserved.
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005