indissoluble
C2Ածական/US /ˌɪˈndɪsəˌlʌbəl/ ˌĭˈndĭsəˌlŭbəl; UK /ˌɪˈndɪsəˌlʌbəl/ ˌĭˈndĭsəˌlŭbəl/
Not dissoluble; not capable of being dissolved, melted, or liquefied; insoluble; as few substances are indissoluble by heat, but many are indissoluble in water.
