The word "Tirsa" is spelled with the letters T-I-R-S-A. In phonetic transcription, it is pronounced /tɪrˈsɑː/. The first two letters "Ti" are pronounced as "tih" with a short "i" sound, followed by "r" pronounced as a rolled "r". The letter "s" in the middle of the word is pronounced as "sah". The last two letters "a" and "a" are pronounced with a long "a" sound. In summary, the correct spelling of "Tirsa" is simple, with its pronunciation being equally simple and straightforward.