Something that is ~ is dirty and unhealthy, so that you may catch a disease from it.
...diseases caused by ~ conditions...
Discharge of raw sewage into the sea is ~ and unsafe.
= unhygienic, insanitary
ADJ
Something that is ~ is dirty and unhealthy, so that you may catch a disease from it.
...diseases caused by ~ conditions...
Discharge of raw sewage into the sea is ~ and unsafe.
= unhygienic, insanitary
ADJ
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012