Vowel whose quality does not change over the duration of the vowel is called a monophthong. Monophthongs are sometimes called "pure" or "stable" vowels. A vowel sound that glides from one quality to another is called a diphthong, and a vowel sound that glides successively through three qualities is a triphthong. All languages have monophthongs and many languages have diphthongs, but triphthongs or vowel sounds with even more target qualities are relatively rare cross-linguistically. English has all three types: the vowel sound in "hit" is a monophthong , the vowel sound in "boy" is in most dialects a diphthong , and
Sujata and seven types of wives the next). They are: The Buddha then states that the following four types are heading for happiness – in this world or the next. A common feature of each of these wives is that they are also imbued with “long term self-control”. They are: After speaking these things, Sujata was deeply moved by Buddha's words. Upon being asked which wife she was to be, she answered: "I am to be the last of the wives, the slave-wife to my husband." It may be argued that in the last case, the Buddha was not praising the qualities of the husband's abuse.