Immaterialised is a word that is spelled with two "m"s and two "l"s. In IPA phonetic transcription, it would be spelled as /ɪməˈtɪərɪəlaɪzd/. The first syllable is pronounced as "im" with a schwa sound followed by a short "i" sound. The second syllable is pronounced with a long "e" sound followed by the letter "a". The third syllable is pronounced with a short "i" sound before the letter "a". The final syllable is pronounced with a long "i" sound before the letter "z" and "d".
Spiritualised.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.