A[k] sound is a very common sound cross-linguistically. Most languages have at least a plain[k], and some distinguish more than one variety. Many languages also have a two-way contrast betweenaspirated and plain[k]. Only a few languages lack a voiceless velar plosive, e.g.Tahitian andMongolian.
Some languages have avoiceless pre-velar plosive,[1] which is articulated slightly more front compared with the place of articulation of the prototypical velar plosive, though not as front as the prototypicalpalatal plosive.
Conversely, some languages have avoiceless post-velar plosive,[2] which is articulated slightly behind the place of articulation of the prototypical velar plosive, though not as back as the prototypicaluvular plosive.
Itsmanner of articulation isocclusive, which means it is produced by obstructing airflow in the vocal tract. Since the consonant is also oral, with nonasal outlet, the airflow is blocked entirely, and the consonant is aplosive.
Itsphonation is voiceless, which means it is produced without vibrations of the vocal cords. In some languages the vocal cords are actively separated, so it is always voiceless; in others the cords are lax, so that it may take on the voicing of adjacent sounds.
It is anoral consonant, which means that air is not allowed to escape through the nose.
It is acentral consonant, which means it is produced by directing the airstream along the center of the tongue, rather than to the sides.
Less often voiced[ɡ]. It is usually transcribed in IPA as⟨ɡ⟩, and it contrasts with aspirated form, which is usually transcribed⟨k⟩.[14] SeeLuxembourgish phonology
^Instead of "pre-velar", it can be called "advanced velar", "fronted velar", "front-velar", "palato-velar", "post-palatal", "retracted palatal" or "backed palatal".
^Instead of "post-velar", it can be called "retracted velar", "backed velar", "pre-uvular", "advanced uvular" or "fronted uvular".
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