The word "lasanius" can be a challenging word to spell for many English speakers. Its correct spelling is Luh-SAY-nee-us, and it is pronounced with four syllables. The first syllable, "luh," is a long U sound, followed by "SAY," which is pronounced like the verb "to say." The final two syllables, "nee" and "us," are pronounced as they appear. This word is not commonly used in everyday conversation, but understanding its correct pronunciation and spelling can be beneficial for language learners.