The word "CASO" is usually spelled as "K-A-S-O" in English. In International Phonetic Alphabet (IPA), the transcription of this word would be [ˈkæsoʊ]. The first sound, represented by "K", is a voiceless velar stop, produced by blocking the air flow with the back of the tongue against the soft palate. The second sound, "A", is a short vowel sound, pronounced with an open mouth. The last sound, "SO", is a diphthong consisting of an "O" sound followed by an "UH" sound.