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A phoneme of a language or dialect is an abstraction of a speech sound or of a group of different sounds which are all perceived to have the same function by speakers of that particular language or dialect. For example, the English word through consists of three phonemes: the initial " th" sound, the " r" sound, and a vowel sound.
The phonemes in this and many other English words do. In the International Phonetic Alphabet ( IPA), monophthongs are transcribed with one symbol, as in English sun [ sʌn], in which ʌ represents a monophthong.