A syllable is a unit of sound organization in language, typically consisting of a central, relatively prominent sound and any surrounding sounds grouped with it. In spoken language, this center is usually a vowel, although certain consonants can also occupy it. Syllables help describe how speech sounds combine into words and how rhythmic units are perceived. They are important in phonetics and phonology, but their boundaries do not always correspond to clearly separable events in the speech signal. (ecampusontario.pressbooks.pub)
Internal structure
A common analysis divides the syllable into three components: onset, nucleus, and coda. The onset contains sounds preceding the nucleus; the coda contains sounds following it. The nucleus and coda together form the rime, also spelled rhyme. In the English word cat, /k/ is the onset, /æ/ the nucleus, and /t/ the coda. The onset and coda are sometimes called syllable margins. Either margin can be absent or contain several sounds. (open.maricopa.edu)
A vowel normally serves as the nucleus. A consonant occupying that position is called a syllabic consonant. For example, some pronunciations of saddle end in syllabic [l̩], and some pronunciations of sudden end in [n̩]. A diphthong involves a change in vowel quality within a single syllable rather than necessarily creating two syllables. (openlibrary-repo.ecampusontario.ca)
A syllable without a coda is open, as in see; one with a coda is closed, as in hat. A syllable without an onset is onsetless. These categories describe sound structure, not spelling. Linguists frequently abbreviate the syllable with the Greek letter σ and represent its components in branching diagrams. (ecampusontario.pressbooks.pub)
Sound sequencing and cross-linguistic variation
Phonotactics concerns restrictions on possible sound combinations. In syllable descriptions, C conventionally represents a consonant and V a vowel or nucleus. Thus CV describes a consonant followed by a vowel, while CVC adds a final consonant. Parentheses indicate optional elements: (C)V permits both CV and V syllables. Such templates summarize possibilities rather than specifying every permitted sound sequence. (wals.info)
Languages differ considerably in their permitted syllable patterns. Some allow little more than a single consonant before a vowel; others permit complex consonant clusters at either margin. English split, for example, begins with three consonants. In linguistic typology, these differences provide a basis for comparing syllable complexity, independently of the number of sounds in a language’s inventory. (wals.info)
Many sequences exhibit a rise toward the nucleus and a fall away from it in sonority, the relative prominence associated with different speech sounds. Vowels generally have high sonority, while sounds produced with stronger obstruction tend to have lower sonority. This pattern is useful for understanding syllable organization, but it is not an exceptionless rule governing every consonant cluster. (open.maricopa.edu)
Syllabification and notation
Syllabification is the assignment of sounds to syllables. A frequently used principle assigns as many intervening consonants as possible to the following onset, provided that the resulting onset is permitted by the language. For example, the medial sequence in ambling can be divided so that /m/ closes the first syllable and /bl/ begins the second. The principle therefore depends on language-specific constraints rather than simply moving every consonant rightward. (open.maricopa.edu)
Syllable boundaries can nevertheless be uncertain. Speakers may agree that a word has two syllables but disagree about where the division lies. English pastry can receive divisions corresponding to past.ry or pas.try. Syllable counts themselves may also vary: words such as hour and higher illustrate differences between speakers’ judgments and the measurable properties of pronunciation. (wals.info)
The International Phonetic Alphabet uses a full stop to indicate a syllable boundary. A small vertical diacritic beneath a consonant, as in [n̩], marks syllabicity. Primary and secondary stress marks are placed before the relevant syllable. These conventions distinguish syllable structure from ordinary orthography, whose letter sequences do not directly identify syllable nuclei or boundaries. (internationalphoneticassociation.org)
Syllable weight and stress
Syllable weight is a phonological distinction that commonly separates light and heavy syllables. Depending on the language, a long vowel, diphthong, or coda may make a syllable heavy. Weight is not simply the number of consonants present: different languages assign different importance to particular structural properties. (wals.info)
In moraic analyses, weight is represented through the mora, conventionally symbolized μ. Light syllables commonly contain one mora and heavy syllables two. The mora is an abstract unit used to model quantity and rhythmic organization, not a universally fixed amount of clock time. (linguistics.ucla.edu)
Weight can influence stress, the relative prominence of a syllable within a word. Some languages preferentially stress heavy syllables; others place stress according to a fixed position or different lexical rules. Accordingly, weight and stress are distinct concepts: a heavy syllable is not necessarily stressed, and a stressed syllable is not necessarily heavy. (wals.info)
Syllables and meaningful units
Syllables organize pronunciation, whereas morphemes associate linguistic form with meaning or grammatical function. Their divisions need not coincide. English cooked contains the morphemes cook and past-tense -ed but ordinarily has one syllable; banana has several syllables while constituting one morpheme. Morphology and syllable analysis therefore describe different aspects of word structure. (ecampusontario.pressbooks.pub)
This distinction is also relevant to literacy instruction. Syllables provide units for analyzing a word’s spoken form, while morphemes reveal meaningful word parts. Reading instruction may address both, without treating sound divisions and meaning divisions as interchangeable. (ufli.education.ufl.edu)