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|Velarized or pharyngealized|
|Sound change and alternation|
|Places of articulation|
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 four diacritics:
̴) covers velarization, uvularization and pharyngealization, as in [ɫ] (the velarized equivalent of [l])
ˠ) after the letter standing for the velarized consonant, as in ⟨tˠ⟩ (a velarized [t])
Although electropalatographic studies have shown that there is a continuum of possible degrees of velarization, the IPA does not specify any way to indicate degrees of velarization, as the difference has not been found to be contrastive in any language. However, the IPA convention of doubling diacritics to indicate a greater degree can be used: ⟨ˠˠ⟩.
A common example of a velarized consonant is the velarized alveolar lateral approximant (or "dark L"). In some accents of English, such as Received Pronunciation, the phoneme /l/ has "dark" and "light" allophones: the "dark", velarized allophone [ɫ] appears in syllable coda position (e.g. in full), while the "light", non-velarized allophone [l] appears in syllable onset position (e.g. in lawn). Other accents of English, such as Scottish English, Australian English, and General American English, have "dark L" in all positions.
For many languages, velarization is generally associated with more dental articulations of coronal consonants so that dark l tends to be dental or dentoalveolar, and clear l tends to be retracted to an alveolar position.
The palatalized/velarized contrast is known by other names, especially in language pedagogy: in Irish and Scottish Gaelic language teaching, the terms slender (for palatalized) and broad (for velarized) are often used. In Scottish Gaelic the terms are caol (for palatalized) and leathann (for velarized).
The terms light or clear (for non-velarized or palatalized) and dark (for velarized) are also widespread. The terms "soft l " and "hard l " are not equivalent to "light l " and "dark l ". The former pair refers to palatalized ("soft" or iotated) and plain ("hard") Slavic consonants.