Firmisternia is a scientific name for a genus of moths. Its spelling can be broken down into its phonetic components: /fɜrmɪ stɜːrnɪə/. The first syllable "fir" is pronounced with a schwa sound followed by an "r" sound. The second syllable "mis" is pronounced with a short "i" sound and the "s" sound. The third syllable "ter" is pronounced with a short "e" sound and the "r" sound. The fourth syllable "ni" is pronounced with a short "i" sound. The fifth syllable "a" is pronounced with a schwa sound. Overall, "Firmisternia" is spelled in accordance with the International Phonetic Alphabet.