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In Slavic languages, iotation (/joʊˈteɪ.ʃən/, /ˌaɪ.oʊˈteɪ.ʃən/) is a form of palatalization that occurs when a consonant comes into contact with the palatal approximant /j/ from the succeeding phoneme. The /j/ is represented by iota (ι) in the early Cyrillic alphabet and the Greek alphabet on which it is based. For example, ni in English onion has the sound of iotated n. Iotation is a phenomenon distinct from Slavic first palatalization in which only the front vowels are involved, but the final result is similar.

Sound change

Iotation occurs when a labial (/m/, /b/), dental (/n/, /s/, /l/) or velar (/k/, /ɡ/, /x/) consonant comes into contact with an iotated vowel, i.e. one preceded by a palatal glide /j/. As a result, the consonant becomes partially or completely palatalized. In many Slavic languages, iotated consonants are called "soft" and the process of iotation is called "softening".

Iotation can result in a partial palatalization so the centre of the tongue is raised during, and sometimes after, the articulation of the consonant. There can also be a complete sound change to a palatal or alveolo-palatal consonant. This table summarizes the typical outcomes in the modern Slavic languages:

According to most scholars, the period of iotation started approximately in the 5th century, in the era of Proto-Slavic, and it lasted for several centuries, probably into the late Common Slavic dialect differentiation. Here is an example from the early stage:

• Proto-Slavic *kĭasĭa > Russian, Ukrainian, Macedonian, Bulgarian чаша, Czech číše, Serbo-Croatian čaša

Orthography

Iotated vowels

In Slavic languages, iotated vowels are preceded by a palatal approximant /j/ before a vowel, at the beginning of a word, or between two vowels in the middle of a word, creating a diphthongoid, a partial diphthong. In the Greek alphabet, the consonant is represented by iota (ι). For example, the English apple is cognate to Russian яблоко (jabloko): both come from Proto-Indo-European stem *ābol-. As a result of the phenomenon, no native Slavic root starts with an or an but only with a and ; although other vowels are possible. An exception to this is Bulgarian, which has lost iotation for all front vowels (compared to Russian or Polish, who lost it only before ).

As it was invented for the writing of Slavic languages, the original Cyrillic alphabet has relatively complex ways for representing iotation by devoting an entire class of letters to deal with the issue. There are letters which represent iotated vowels; the same letters also palatalize preceding consonants (with or without self-iotation), which is why iotation and palatalization are often mixed up. There are also two special letters (soft sign Ь and hard sign Ъ) that also induce iotation; in addition, Ь palatalizes preceding consonant, allowing combinations of both palatalized (soft) and plain (hard) consonants with . Originally, these letters produced short vowels and . The exact use depends on the language.

The adjective for a phone which undergoes iotation is iotated. The adjective for a letter formed as a ligature of the Early Cyrillic I (І) and another letter, used to represent iotation, is iotated.. The use of an iotated letter does not necessarily denote iotation. Even an iotated letter following a consonant letter is not iotated in most orthographies, but iotated letters imply iotated pronunciation after vowels and soft and hard signs as well as in isolation.

In the Cyrillic alphabet, some letter forms are iotated, formed as a ligature of Early Cyrillic I (І) and a vowel.

In old inscriptions, other iotated letters, even consonants, could be found, but they are not in the regular alphabet.

There are more letters that serve the same function, but their glyphs are not made in the same way.

Iotated consonants

Iotated consonants occur as result of iotation. They are represented in IPA with superscript j after it and in X-SAMPA with apostrophe after it so the pronunciation of iotated n could be represented as or .

When Vuk Karadžić reformed the Serbian language, he created new letters to represent iotated consonants. Macedonian uses two of them, but has its own versions for iotated t and d (resembling the letters Г and К instead of Т and Д):

See also

• Cyrillic alphabet
• Cyrillic ligatures
• Iotacism
• Palatalization, the historical-linguistic sound change
• Soft sign

References

1. ^ Bethin 1998, p. 36.
2. "Йотация // Словарь литературных терминов. Т. 1. — 1925 (текст)". Feb-web.ru. Retrieved 2011-09-17.

Bibliography

• Lunt, Horace Gray (2001). Old Church Slavonic Grammar. Walter de Gruyter. ISBN 9783110162844.
• Bethin, Christina Y. (1998). Slavic Prosody: Language Change and Phonological Theory. Cambridge Studies in Linguistics. Cambridge University Press. ISBN 9780521591485.

• Assimilation (linguistics)
• Cyrillic script