If people or things are ~, you do not know where they are or what has happened to them.
5,000 American servicemen who fought in Korea are still ~...
About ?50 million from the robbery five years ago is ~.
ADJ: v-link ADJ
If people or things are ~, you do not know where they are or what has happened to them.
5,000 American servicemen who fought in Korea are still ~...
About ?50 million from the robbery five years ago is ~.
ADJ: v-link ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012