If something is ~, it has not been or cannot be harmed or affected by anything. (FORMAL)
We believed our love was ~.
ADJ
If something is ~, it has not been or cannot be harmed or affected by anything. (FORMAL)
We believed our love was ~.
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012