The spelling of the word "Petrija" is a bit tricky, as it involves different phonetic sounds. The word is pronounced as /pɛtriːja/, with the stress on the second syllable. The "e" in the first syllable is pronounced as a short "e" sound, while the "i" in the second syllable is pronounced as a long "i" sound. The letter "j" in the final syllable is pronounced as a "y" sound. Overall, the spelling of "Petrija" reflects the complex phonetic makeup of the word.