un‧ac‧count‧ed for /ʌnəˈkaʊntəd fɔː, ʌnəˈkaʊntɪd fɔː $ -fɔːr/
adjective something or someone that is unaccounted for cannot be found or their absence cannot be explained:
Two people are still unaccounted for after the floods. [TahlilGaran] Dictionary of Contemporary English ▲