unclean
adjective uk/ʌnˈkliːn/ us/ʌnˈkliːn/
不洁净的，肮脏的
not clean and therefore likely to cause disease
The health risk from drinking unclean water is considerable. 喝不洁净的水对健康的威胁相当大。
formal（宗教上）不洁净的;邪恶的
not clean or pure, or morally bad, as described by the rules of a religion
Jews and Muslims consider pigs unclean. 犹太人和穆斯林认为猪是不洁净的。