The spelling of the word "carius" is quite simple, as it is written exactly as it sounds. The IPA phonetic transcription for "carius" is /ˈkaɪrɪəs/. The first syllable, "kai", is pronounced with a long "i" sound, followed by the second syllable, "ri", which has a short "i" sound. The final syllable, "us", is pronounced with a schwa sound, similar to the "a" in "about". Thus, the spelling of "carius" accurately reflects its pronunciation.