UNOBSERVED
Meaning of UNOBSERVED in English
un ‧ ob ‧ served /ˌʌnəbˈzɜːvd $ -ɜːrvd/ BrE AmE adjective , adverb
not noticed:
Frank slipped out of the meeting unobserved.
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012