Labialisation
Encyclopedia
"Lip rounding" redirects here. See Roundedness
Roundedness
In phonetics, vowel roundedness refers to the amount of rounding in the lips during the articulation of a vowel. That is, it is vocalic labialization. When pronouncing a rounded vowel, the lips form a circular opening, while unrounded vowels are pronounced with the lips relaxed...

 for the lip rounding of vowels.


Labialization is a secondary articulatory
Secondary articulation
Secondary articulation refers to co-articulated consonants where the two articulations are not of the same manner. The approximant-like secondary articulation is weaker than the primary, and colors it rather than obscuring it...

 feature of sounds in some languages. Labialized sounds involve the lips while the remainder of the oral cavity
Mouth
The mouth is the first portion of the alimentary canal that receives food andsaliva. The oral mucosa is the mucous membrane epithelium lining the inside of the mouth....

 produces another sound. The term is normally restricted to consonant
Consonant
In articulatory phonetics, a consonant is a speech sound that is articulated with complete or partial closure of the vocal tract. Examples are , pronounced with the lips; , pronounced with the front of the tongue; , pronounced with the back of the tongue; , pronounced in the throat; and ,...

s. When vowels involve the lips, they are called rounded
Roundedness
In phonetics, vowel roundedness refers to the amount of rounding in the lips during the articulation of a vowel. That is, it is vocalic labialization. When pronouncing a rounded vowel, the lips form a circular opening, while unrounded vowels are pronounced with the lips relaxed...

.

The most common labialized consonants are labialized velars. Most other labialized sounds also have simultaneous velarization
Velarization
Velarization is a secondary articulation of consonants by which the back of the tongue is raised toward the velum during the articulation of the consonant.In the International Phonetic Alphabet, velarization is transcribed by one of three diacritics:...

, and the process may then be more precisely called labio-velarization.

Labialization may also refer to a type of assimilation
Assimilation (linguistics)
Assimilation is a common phonological process by which the sound of the ending of one word blends into the sound of the beginning of the following word. This occurs when the parts of the mouth and vocal cords start to form the beginning sounds of the next word before the last sound has been...

 process.

Where found

Labialization is the most widespread secondary articulation in the world's languages. It is phonemically contrastive in the Northwest Caucasian
Northwest Caucasian languages
The Northwest Caucasian languages, also called Abkhazo-Adyghean, or sometimes Pontic as opposed to Caspian for the Northeast Caucasian languages, are a group of languages spoken in the Caucasus region, chiefly in Russia , the disputed territory of Abkhazia, and Turkey, with smaller communities...

, Athabaskan
Athabaskan languages
Athabaskan or Athabascan is a large group of indigenous peoples of North America, located in two main Southern and Northern groups in western North America, and of their language family...

, and Salishan
Salishan languages
The Salishan languages are a group of languages of the Pacific Northwest...

 language families
Language family
A language family is a group of languages related through descent from a common ancestor, called the proto-language of that family. The term 'family' comes from the tree model of language origination in historical linguistics, which makes use of a metaphor comparing languages to people in a...

, among others. This contrast is reconstructed also for Proto-Indo-European
Proto-Indo-European language
The Proto-Indo-European language is the reconstructed common ancestor of the Indo-European languages, spoken by the Proto-Indo-Europeans...

, the common ancestor of the Indo-European languages
Indo-European languages
The Indo-European languages are a family of several hundred related languages and dialects, including most major current languages of Europe, the Iranian plateau, and South Asia and also historically predominant in Anatolia...

.

American English has three degrees of labialization: tight rounded (/w/), slight rounded (/ʃ/, /ʒ/, /tʃ/, /dʒ/, initial /r/), and unrounded, which in vowels is sometimes called 'spread'. These secondary articulations are not universal. For example, French
French language
French is a Romance language spoken as a first language in France, the Romandy region in Switzerland, Wallonia and Brussels in Belgium, Monaco, the regions of Quebec and Acadia in Canada, and by various communities elsewhere. Second-language speakers of French are distributed throughout many parts...

 shares the English
English language
English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...

 slight rounding of /ʃ/, /ʒ/ while Russian
Russian language
Russian is a Slavic language used primarily in Russia, Belarus, Uzbekistan, Kazakhstan, Tajikistan and Kyrgyzstan. It is an unofficial but widely spoken language in Ukraine, Moldova, Latvia, Turkmenistan and Estonia and, to a lesser extent, the other countries that were once constituent republics...

 does not have slight rounding in its postalveolar fricatives (/ʂ ʐ ɕ ʑ/).

Types of labialization

Out of 706 language inventories surveyed by , labialization occurred most often with velar
Velar consonant
Velars are consonants articulated with the back part of the tongue against the soft palate, the back part of the roof of the mouth, known also as the velum)....

 (42%) and uvular
Uvular consonant
Uvulars are consonants articulated with the back of the tongue against or near the uvula, that is, further back in the mouth than velar consonants. Uvulars may be plosives, fricatives, nasal stops, trills, or approximants, though the IPA does not provide a separate symbol for the approximant, and...

 (15%) segments and least often with dental and alveolar
Alveolar consonant
Alveolar consonants are articulated with the tongue against or close to the superior alveolar ridge, which is called that because it contains the alveoli of the superior teeth...

 segments. With non-dorsal consonants, labialization may include velarization
Velarization
Velarization is a secondary articulation of consonants by which the back of the tongue is raised toward the velum during the articulation of the consonant.In the International Phonetic Alphabet, velarization is transcribed by one of three diacritics:...

 as well. Labialization is not restricted to lip-rounding. The following articulations have either been described as labialization, or been found as allophonic
Allophone
In phonology, an allophone is one of a set of multiple possible spoken sounds used to pronounce a single phoneme. For example, and are allophones for the phoneme in the English language...

 realizations of prototypical labialization:
  • Labial rounding, with or without protrusion of the lips (found in Navajo
    Navajo language
    Navajo or Navaho is an Athabaskan language spoken in the southwestern United States. It is geographically and linguistically one of the Southern Athabaskan languages .Navajo has more speakers than any other Native American language north of the...

    )
  • Labiodental frication, found in Abkhaz
    Abkhaz language
    Abkhaz is a Northwest Caucasian language spoken mainly by the Abkhaz people. It is the official language of Abkhazia where around 100,000 people speak it. Furthermore, it is spoken by thousands of members of the Abkhazian diaspora in Turkey, Georgia's autonomous republic of Adjara, Syria, Jordan...

  • Bilabial frication, found in Ubykh
    Ubykh language
    Ubykh or Ubyx is an extinct language of the Northwestern Caucasian group, spoken by the Ubykh people...

  • Bilabial trill
    Bilabial trill
    -External links:*...

    , found in Ubykh
  • Bilabial plosion, found in Ubykh
  • "Labialization" (/w/, /ɡʷ/, and /kʷ/) without noticeable rounding (protrusion) of the lips, found in the Iroquoian languages
    Iroquoian languages
    The Iroquoian languages are a First Nation and Native American language family.-Family division:*Ruttenber, Edward Manning. 1992 [1872]. History of the Indian tribes of Hudson's River. Hope Farm Press....

    . It may be that they are compressed
    Roundedness
    In phonetics, vowel roundedness refers to the amount of rounding in the lips during the articulation of a vowel. That is, it is vocalic labialization. When pronouncing a rounded vowel, the lips form a circular opening, while unrounded vowels are pronounced with the lips relaxed...

    .
  • Rounding without velarization, found in Shona
    Shona language
    Shona is a Bantu language, native to the Shona people of Zimbabwe and southern Zambia; the term is also used to identify peoples who speak one of the Shona language dialects: Zezuru, Karanga, Manyika, Ndau and Korekore...

    and in the Bzyb dialect
    Bzyb dialect
    Bzyb is a major dialect of Abkhaz, spoken in the Caucasus and Turkey. It is named after the Bzyb area.It differs from standard Abkhaz mainly in terms of phonology. It shares the and sounds with the Sadz dialect, and the , , , , , , and sounds are unique to Bzyp...

     of Abkhaz
    Abkhaz language
    Abkhaz is a Northwest Caucasian language spoken mainly by the Abkhaz people. It is the official language of Abkhazia where around 100,000 people speak it. Furthermore, it is spoken by thousands of members of the Abkhazian diaspora in Turkey, Georgia's autonomous republic of Adjara, Syria, Jordan...

    .


Eastern
Eastern Arrernte
Eastern Arrernte refers to Arrernte people, Indigenous Australians, who traditionally live in the Arrernte lands East of Alice Springs, including Wallace Rock Hole. It also refers to a dialect of the Arrernte language that is spoken in this area...

 Arrernte has labialization at all places
Place of articulation
In articulatory phonetics, the place of articulation of a consonant is the point of contact where an obstruction occurs in the vocal tract between an articulatory gesture, an active articulator , and a passive location...

 and manners of articulation
Manner of articulation
In linguistics, manner of articulation describes how the tongue, lips, jaw, and other speech organs are involved in making a sound. Often the concept is only used for the production of consonants, even though the movement of the articulars will also greatly alter the resonant properties of the...

; this derives historically from adjacent rounded vowels, as is also the case of the Northwest Caucasian languages
Northwest Caucasian languages
The Northwest Caucasian languages, also called Abkhazo-Adyghean, or sometimes Pontic as opposed to Caspian for the Northeast Caucasian languages, are a group of languages spoken in the Caucasus region, chiefly in Russia , the disputed territory of Abkhazia, and Turkey, with smaller communities...

. Marshallese
Marshallese language
The Marshallese language is a Malayo-Polynesian language of the Marshall Islands, and the principal language of the country...

 also has labialization at all places of articulation except for coronal
Coronal consonant
Coronal consonants are consonants articulated with the flexible front part of the tongue. Only the coronal consonants can be divided into apical , laminal , domed , or subapical , as well as a few rarer orientations, because only the front of the tongue has such...

 obstruents.

Transcription

In the International Phonetic Alphabet
International Phonetic Alphabet
The International Phonetic Alphabet "The acronym 'IPA' strictly refers [...] to the 'International Phonetic Association'. But it is now such a common practice to use the acronym also to refer to the alphabet itself that resistance seems pedantic...

, labialization of velar consonants is indicated with a raised w modifier [ʷ] (Unicode
Unicode
Unicode is a computing industry standard for the consistent encoding, representation and handling of text expressed in most of the world's writing systems...

 U+02B7), as in /kʷ/. (Elsewhere this diacritic generally indicates simultaneous labialization and velarization.) There are also diacritics, respectively [ɔ̹], [ɔ̜], to indicate greater or lesser degrees of rounding. These are normally used with vowels, but may occur with consonants. For example, in the Athabaskan language
Athabaskan languages
Athabaskan or Athabascan is a large group of indigenous peoples of North America, located in two main Southern and Northern groups in western North America, and of their language family...

 Hupa
Hupa language
-External links :* * overview at the Survey of California and Other Indian Languages*...

, voiceless velar fricative
Voiceless velar fricative
The voiceless velar fricative is a type of consonantal sound used in some spoken languages. The sound was part of the consonant inventory of Old English and can still be found in some dialects of English, most notably in Scottish English....

s distinguish three degrees of labialization, transcribed either /x/, /x̹/, /xʷ/ or /x/, /x̜ʷ/, /xʷ/.

The Extensions to the IPA
Extensions to the IPA
The Extensions to the IPA are extensions of the International Phonetic Alphabet and were designed for disordered speech. However, some of the symbols are occasionally used for transcribing normal speech as well, particularly in certain languages.-Brackets:The Extended IPA for speech pathology has...

 has two additional symbols for degrees of rounding: Spread /ɹ͍/ and open-rounded /ʒœ/. It also has a symbol for labialdentalized
Labiodental approximant
The labiodental approximant is a type of consonantal sound, similar to an English double-u pronounced with the teeth and lips held in the position used to articulate the letter vee, used in some spoken languages...

 sounds, /tʋ/.

If precision is desired, the Abkhaz and Ubykh articulations may be transcribed with the appropriate fricative or trill raised as a diacritic: [tᵛ], [tᵝ], [tʙ], [tᵖ].

For simple labialization, resurrected an old IPA symbol, [ ̫]. However, their chief example is Shona sv and zv, which they transcribe /s̫/ and /z̫/ but which actually seem to be whistled sibilants, without necessarily being labialized. The open rounding of English /ʃ/ is also unvelarized.

Labial assimilation

Labialization also refers to a specific type of assimilatory process where a given sound become labialized due to the influence of neighboring labial sounds. For example, /k/ may become /kʷ/ in the environment of /o/, or /a/ may become /o/ in the environment of /p/ or /kʷ/.

In the Northwest Caucasian languages
Northwest Caucasian languages
The Northwest Caucasian languages, also called Abkhazo-Adyghean, or sometimes Pontic as opposed to Caspian for the Northeast Caucasian languages, are a group of languages spoken in the Caucasus region, chiefly in Russia , the disputed territory of Abkhazia, and Turkey, with smaller communities...

 as well as some Australian languages rounding has shifted from the vowels to the consonants, producing a wide range of labialized consonants and leaving in some cases only two phonemic vowels. This appears to have been the case in Ubykh and Eastern Arrernte
Eastern Arrernte
Eastern Arrernte refers to Arrernte people, Indigenous Australians, who traditionally live in the Arrernte lands East of Alice Springs, including Wallace Rock Hole. It also refers to a dialect of the Arrernte language that is spoken in this area...

, for example. The labial vowel sounds usually still remain, but only as allophones next to the now-labial consonant sounds.
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