Everything about Mora Linguistics totally explained
Mora (plural
moras or
morae) is a unit of sound used in
phonology that determines
syllable weight (which in turn determines
stress or
timing) in some languages. Like many technical
linguistics terms, the exact definition of mora is debated. The term comes from the
Latin word for "linger, delay", which was also used to translate the Greek word
chronos (time) in its
metrical sense.
A
syllable containing one mora is said to be
monomoraic; one with two moras is called
bimoraic.
In general, moras are formed as follows:
- A syllable onset (the first consonant(s) of the syllable) doesn't represent any mora.
- The syllable nucleus represents one mora in the case of a short vowel, and two moras in the case of a long vowel or diphthong. Consonants serving as syllable nuclei also represent one mora if short and two if long. (Slovak is an example of a language that has both long and short consonantal nuclei.)
- In some languages (for example, Japanese), the coda represents one mora, and in others (for example, Irish) it does not. In English, the codas of stressed syllables represent a mora (thus, the word cat is bimoraic), but for unstressed syllables it isn't clear whether the codas do (the second syllable of the word rabbit might be monomoraic).
- In some languages, a syllable with a long vowel or diphthong in the nucleus and one or more consonants in the coda is said to be trimoraic (see pluti).
In general, monomoraic syllables are said to be
light syllables, bimoraic syllables are said to be
heavy syllables, and trimoraic syllables (in languages that have them) are said to be
superheavy syllables. Most linguists believe that no language uses syllables containing four or more moras.
Japanese is a language famous for its
moraic qualities. Most dialects, including the standard, use moras (in Japanese,
onji) as the basis of the sound system rather than syllables. For example,
haiku in modern Japanese don't follow the pattern 5 syllables/7 syllables/5 syllables, as commonly believed, but rather the pattern 5 moras/7 moras/5 moras. As one example, the Japanese syllable-final
n is moraic, as is the first part of a geminate consonant. For example, the word
Nippon (one of the pronunciations of 日本, the name for "
Japan" in Japanese) has four moras (
NI-P-PO-N).
Further Information
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