The word "thopia" is not a commonly used word in English. However, if we were to spell it phonetically using the International Phonetic Alphabet (IPA), the correct spelling would be /θoʊpiə/. The first sound is "th" as in "thin," followed by "oh" as in "go," and then "pia" pronounced as "pee-uh." In English, it is possible for two or more letters to represent a single sound, which is why using the IPA can help clarify the correct spelling and pronunciation of unfamiliar words.