UNSOLVED
Meaning of UNSOLVED in English
/ ˌʌnˈsɒlvd; NAmE ˌʌnˈsɑːlvd/ adjective
not having been solved :
an unsolved murder / mystery / problem
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005