"Peltidium" [pɛltɪdiəm] is a challenging word to spell due to its uncommon combination of letters. The IPA phonetic transcription shows that the first syllable is pronounced as [pɛlt], with the "e" being pronounced as "eh" and the "l" being doubled. The second syllable is pronounced as [ɪdiəm], with the "i" being pronounced as "ih". This word is not commonly used in everyday language, but it refers to a small genus of aquatic plants that grow in shallow water.