The voiced velar approximant is a type of consonantal sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is ⟨?⟩, and the equivalent X-SAMPA symbol is
The consonant is not present in English, but approximates to the sound of a 'g' with the throat kept open. The voiced velar approximant can in many cases be considered the semivocalic counterpart of the close back unrounded vowel [?]. The two are almost identical featurally. ⟨?⟩ and ⟨⟩ with the non-syllabic diacritic are used in different transcription systems to represent the same sound.
Some languages have the voiced pre-velar approximant, which is articulated slightly more front compared with the place of articulation of the prototypical voiced velar approximant, though not as front as the prototypical palatal approximant.
The symbol for the velar approximant originates from ⟨?⟩, but with a vertical line. Compare ⟨u⟩ and ⟨?⟩ for the labio-palatal approximant.
Features of the velar approximant:
|Aragonese||caixigo||[kaj'?io?]||'oak tree'||Unspecified for rounding voiced velar approximant consonant; allophone of /?/.|
|Astur-Leonese||Asturian||[example needed]||Unspecified for rounding voiced velar approximant consonant; allophone of /?/.|
|Catalan||aigua||['ajw?]||'water'||Unspecified for rounding voiced velar approximant consonant; allophone of /?/. See Catalan phonology|
|Cherokee||?? wa-tsi||[?adi]||'watch'||Found only in the Western dialect. Its equivalent in other dialects is [w]. Also represented by ?, ?, ?, ?, and ?|
|Danish||Older speakers||talg||['t?al]||'tallow'||Unspecified for rounding voiced velar approximant consonant. Still used by some older speakers in high register, much more commonly than a fricative . Depending on the environment, it corresponds to ,  or in young speakers of contemporary Standard Danish. See Danish phonology|
|Dutch||East Flemish||Typical realization of /?/ in western dialects.|
|French||Belgian||ara||[a?a]||'macaw'||Intervocalic allophone of /?/ for some speakers, unless /?/ is realized as a liaison consonant - then, most often, it is realized as a trill . See French phonology|
|Galician||auga||['?w]||'water'||Unspecified for rounding voiced velar approximant consonant; allophone of /?/. See Galician phonology|
|Greek||Cypriot||?||[ma?a'zi]||'shop'||Allophone of /?/.|
|Guarani||gotyo||[?o't?o]||'near, close to'||Contrasts with [w]|
|Ibibio||ufok?||[úf]||[translation needed]||Intervocalic allophone of /k/; may be a uvular tap instead.|
|Icelandic||saga||['sä:ä]||'saga'||Unspecified for rounding voiced velar approximant consonant. See Icelandic phonology|
|Irish||naoi||[ni:]||'nine'||Occurs only between broad consonants and front vowels. See Irish phonology|
|Korean||/ uisa||[?is?]||'doctor'||Occurs only before /i/. See Korean phonology|
|Shipibo||igi||[ii?]||[translation needed]||Allophone of /k/ in certain high-frequency morphemes; can be realized as a fricative instead.|
|Spanish||pagar||[pä'ä?]||'to pay'||Unspecified for rounding voiced velar approximant consonant; allophone of /?/. See Spanish phonology|
|Swedish||Central Standard||agronom||'agronomist'||Unspecified for rounding voiced velar approximant consonant; allophone of /g/ in casual speech. See Swedish phonology|
|Tagalog||igriega||[i:'je]||'y (letter)'||See Tagalog phonology|
|Vietnamese||Southern||gà||'chicken'||Typical realization of /g?/ or /?/ in other dialects. Variant is in complementary distribution before open vowels.|
The sound in Japanese often denoted by ⟨w⟩ in IPA notation and described as unrounded is actually pronounced with lip compression and is therefore labio-velar, albeit with acoustic differences from other labio-velar consonants.
Some languages have a voiced velar approximant that is unspecified for rounding, and therefore cannot be considered the semivocalic equivalent of either [?] or its rounded counterpart . Examples of such languages are Catalan, Galician and Spanish, in which the unspecified for rounding voiced velar approximant consonant (not semivowel) appears as an allophone of /?/.
Eugenio Martínez Celdrán describes the voiced velar approximant consonant as follows:
As for the symbol [?], it is quite evidently inappropriate for representing the Spanish voiced velar approximant consonant. Many authors have pointed out the fact that [?] is not rounded; for example, Pullum & Ladusaw (1986:98) state that 'the sound in question can be described as a semi-vowel (glide) with the properties "high", "back", and "unrounded"'. They even establish an interesting parallelism: 'the sound can be regarded as an unrounded '. It is evident, then, that [?] is not an adequate symbol for Spanish. First of all, because it has never been taken into consideration that there is a diphthong in words like paga 'pay', vago 'lazy', lego 'lay', etc., and, secondly, because this sound is rounded when it precedes rounded vowels. Besides, it would be utterly wrong to transcribe the word jugo 'juice' with [?] *['?u?o], because the pronunciation of that consonant between two rounded vowels is completely rounded whereas [?] is not. (...)
The symbol I have always proposed is , the correlate to the other central approximants in Spanish, [ ð?] (Martínez Celdrán 1991, 1996:47). This coincides with Ball & Rahilly (1999:90), whose example for the three approximants is the Spanish word abogado 'lawyer' (see figure 1). Ball & Rahilly too criticise in a footnote the confusion between these symbols: 'The difference between an approximant version of the voiced velar fricative [?], and the velar semi-vowel [?] is that the latter requires spread lips, and must have a slightly more open articulatory channel so that it becomes if prolonged' (p. 189, fn. 1).
There is a parallel problem with transcribing the palatal approximant.
The symbol ⟨⟩ may also be used when the voiced velar approximant is merely an allophone of the voiced velar fricative /?/ as, compared with ⟨?⟩, it is more similar to the symbol ⟨?⟩. The X-SAMPA equivalent of ⟨⟩ is
The symbol ⟨⟩ may not display properly in all browsers. In that case, ⟨⟩ should be substituted. In broader transcriptions, the lowering diacritic may be omitted altogether, so that the symbol is rendered ⟨?⟩, i.e. as if it represented the corresponding fricative.