Vowel the vowel sounds of "flower", , form a triphthong or disyllable, depending on dialect. In phonology, diphthongs and triphthongs are distinguished from sequences of monophthongs by whether the vowel sound may be analyzed into different phonemes or not. For example, the vowel sounds in a two-syllable pronunciation of the word "flower" () phonetically form a disyllabic triphthong, but are phonologically a sequence of a diphthong (represented by the letters ) and a monophthong (represented by the letters ). Some linguists use the terms "diphthong" and "triphthong" only in this phonemic sense. The name "vowel" is often used for the symbols
Triphthong realizations of are possible, and are regarded as "very strongly Cockney". Among these, the triphthongal realization of occurs most commonly. There is not a complete agreement about the distribution of these; according to , they "occur in sentence-final position", whereas according to , these are "most common in final position". Bernese German has the following triphthongs: Northern Bavarian has the following triphthongs: The Northern Bavarian triphthongs have evolved from combinations of former long vowels or diphthongs from the Middle High German (MHG) period and vocalized "r". Portuguese: Some Portuguese triphthongs appear in places where some speakers can break the first