The word "Trithio" is spelled with the letters T-R-I-T-H-I-O. In terms of its phonetic transcription, it can be written as /trɪθioʊ/. The "th" sound is pronounced like "th" in "think" or "thin," and the "io" is pronounced like "ee-oh." The stress is on the first syllable, which is pronounced like "tri." Overall, the word "Trithio" is relatively easy to spell and pronunciation can be achieved through familiarity with phonetic transcription.