Ə, or ə, is an additional letter of the Latin alphabet. It is also called schwa, from another name for the mid central vowel, the sound represented by minuscule ə in the International Phonetic Alphabet (IPA).
It was invented by Johann Andreas Schmeller for the reduced vowel at the end of some German words and first used in his 1820s works on the Bavarian dialects.
The word, schwa, comes from the Hebrew language Shva (via German), a Niqqud, which in most cases in Modern Hebrew denotes a de-emphasis of an accompanying vowel that would otherwise be pronounced strongly. Shva itself is silent and is not a mid central vowel, which does not exist in Modern Hebrew.
A superscript minuscule () is used to modify the preceding consonant to have a mid central vowel release, though it is also commonly used to indicate possible syllabicity of the following sonorant, especially in transcriptions of English. The latter usage is non-standard.
In the Azerbaijani alphabet, represents the near-open front unrounded vowel, , like the pronunciation of in "c at". The letter was used in the 1992 Chechen language Latin alphabet proposal where it represented the glottal stop, , like the pronunciation of in GA "bu tton". It was also used in the Uniform Turkic Alphabet, for example in Janalif for the Tatar language in the 1920s–1930s. Also, in a romanization of Pashto language, the letter is used to represent . When some Roman orthographies in the Soviet Union were converted to use the Cyrillic script in the 1930s and 1940s, this letter has been adopted .
In the Karay-a language alphabet, the letter represents .
In the Latin transliteration of Avestan, the corresponding long vowel is written as schwa-macron, .
An R-colored vowel can be represented using .
A schwa with a retroflex hook is used in phonetic transcription.
This niche usage is controversial—as well as mainly limited to written language, as there is no real consensus on how the -ə suffix should be pronounced—and has been criticized by the Accademia della Crusca. The president of the Accademia opposed its use, and the Accademia answered to a question posed by the Equal Opportunities Committee of the Supreme Court of Cassation for the introduction of the schwa in juridical language, stating that "juridical language is not the place to experiment with minority-led innovations that would lead to irregularity and idiolects".
In Windows, the characters can be generated by holding the key and pressing the respective decimal Unicode number, which can be found in the table (e.g. 399, 601), on the number pad preceded by a leading . With a Linux compose key, the lowercase letter is by default generated by .
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