many languages forbid syllable codas. Examples are Swahili and Hawaiian. In others, codas are restricted to a small subset of the consonants that appear in onset position. At a phonemic level in Japanese, for example, a coda may only be a nasal (homorganic with any following consonant) or, in the middle of a word, gemination of the following consonant. (On a phonetic level, other codas occur due to elision of /i/ and /u/.) In other languages, nearly any consonant allowed as an onset is also allowed in the coda, even clusters of consonants. In English, for example, all onset consonants except are allowed as syllable codas. If the coda consists of a consonant cluster, the sonority typically decreases from first to last, as in the English word help. This is called the sonority hierarchy (or sonority scale). English onset and coda clusters are therefore different. The onset in strengths does not appear as a coda in any English word. However, some clusters do occur as both onsets and codas, such as in stardust. The sonority hierarchy is more strict in some languages and less strict in others. Open and closed A coda-less syllable of the form V, CV, CCV, etc. (V = vowel, C = consonant) is called an open syllable or free syllable, while a syllable that has a coda (VC, CVC, CVCC, etc.) is called a closed syllable or checked syllable. They have nothing to do with open and close vowels, but are defined according to the phoneme that ends the syllable: a vowel (open syllable) or a consonant (closed syllable). Almost all languages allow open syllables, but some, such as Hawaiian, do not have closed syllables. When a syllable is not the last syllable in a word, the nucleus normally must be followed by two consonants in order for the syllable to be closed. This is because a single following consonant is typically considered the onset of the following syllable. For example, Spanish ("to marry") is composed of an open syllable followed by a closed syllable (ca-sar), whereas "to get tired" is composed of two closed syllables (can-sar). When a geminate (double) consonant occurs, the syllable boundary occurs in the middle, e.g. Italian "cream" (pan-na); cf. Italian "bread" (pa-ne). English words may consist of a single closed syllable, with nucleus denoted by ν, and coda denoted by κ: in: ν = , κ = cup: ν =