Marettum is a rare word that refers to a type of salt that is extracted from seawater. Its pronunciation is mə-REHT-uhm, with stress on the second syllable. The first syllable is pronounced with a schwa vowel sound, like the "u" in "but", and the final syllable sounds similar to the "um" in "maximum". The letter "a" is pronounced like the "a" in "cat", while the letter "e" sounds like the "e" in "bed". The IPA phonetic transcription of marettum is məˈrɛtəm.