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Bilabial trill: Wikis

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IPA – number 121
IPA – text ʙ
IPA – image {{{imagesize}}}
Entity ʙ
X-SAMPA B\
Kirshenbaum b<trl>
About this sound Sound sample

The bilabial trill is a type of consonantal sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is ʙ (a character used as a lower case form of B in Jaŋalif and similar alphabets), and the equivalent X-SAMPA symbol is B\.

In many of the languages where the bilabial trill occurs, it occurs only as part of a prenasalised bilabial stop with trilled release, [mbʙ]. This developed historically from a prenasalized stop before a relatively high back vowel, such as [mbu]. In such instances, these sounds are usually still limited to the environment of a following [u].

There is also a very rare voiceless alveolar bilabially trilled affricate, [t̪͡ʙ̥] (occasionally written "tp") reported from a few words in the Chapacuran languages, Wari’ and Oro Win. The sound also appears as an allophone of the labialized voiceless alveolar plosive /tʷ/ of Abkhaz and Ubykh, but in those languages it is more often realised by a doubly articulated stop [t͡p]. In the Chapacuran languages, [tʙ̥] is reported almost exclusively before rounded vowels such as [o] and [y].

Contents

Features

Features of the bilabial trill:

Occurrence

Language Word IPA Meaning Notes
Ngwe Lebang dialect [àʙɨ́ ́] 'ash'
Kele[1] [mʙulim] 'face'
Kom [ʙ̥ɨmɨ] 'to believe'
Mangbetu example needed -- contrasts with voiceless counterpart
Pirahã kaoáíbogi [kàò̯áí̯ʙòˈɡì] 'evil spirit' allophone of /b/ before /o/
Titan[2] [mʙutukei] 'wooden plate'
Wari’ [t͡ʙ̥ot͡ʙ̥oweʔ] 'chicken'

See also

References

Bibliography

  • Ladefoged, Peter (2005). Vowels and Consonants (Second ed.). Blackwell.  

External links

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