The spelling of the word "rivo" is a bit unusual. It is pronounced as /rivoʊ/ in IPA phonetic transcription, which means that it contains the vowel sound /oʊ/ (as in "go") followed by the consonant sound /v/. Typically, words that end in -o are pronounced with a long "o" sound (as in "toe"), but in this case, the "o" sound is shortened and followed by the consonant without a vowel sound in between. It is important to remember this unique spelling when using or encountering the word "rivo."