A phoneme is the basic unit of sound and is the identification that differentiates one language from another. The sounds of spoken language are known as phonemes. For example, /water/ has two syllables but it has four phonemes: w/a/t/er.Syllable:A syllable is a sound of a vowel (A, E, I, O, U) that is created when pronouncing the letters, A, E, I, O, U, or Y. Here, the letter "Y" is a vowel only if it creates an A, E, I, O, or U sound. For example, in fry, try, cry, and dry.The number of times that you hear the sound of a vowel is the number of syllables in a word. Thus, a syllable is a unit of pronunciation that has one vowel sound, with or without surrounding consonants, forming the whole or a part of a word.For example, there are two syllables in water (wa/ter) and three in inferno (in/fer/no).From the above point, we can conclude that when different phonemes (e.g. consonant sounds or vowel sounds) are combined to target a specific meaning to form a part of a meaningful world, it becomes a syllable.Additional InformationA morpheme is the smallest unit of meaning that can't be broken up. Eg- 'un' in the word unable.Allophones are a kind of phoneme that changes their sound based on how a word is spelled.A Grapheme is a written symbol that represents a sound (phoneme). This can be a single letter or could be a sequence of letters, such as ai, sh, igh, tch, etc.