"Mannitate" is a rarely-used word that refers to a salt or organic compound that contains the mannitol radical. Its spelling can be explained using IPA phonetic transcription, which is a system of symbols used to represent the sounds of speech. The first syllable, "man," is pronounced /mæn/, while the second syllable, "ni," is pronounced /naɪ/. The final syllable, "tate," is pronounced /teɪt/. Therefore, the proper pronunciation of "mannitate" is /ˈmæn.naɪ.teɪt/.