The word "twiss" is spelled using the IPA phonetic transcription as /twɪs/. It is composed of five letters, including two consonants and three vowels. The "t" is a voiceless alveolar stop, followed by the "w", which is a voiced labial-velar approximant. The "i" and "s" are both voiced, with the "i" being a high front unrounded vowel and the "s" being a voiceless alveolar fricative. The second "s" ends the word with the same phoneme as the first.