A lateral nasal click is a click consonant found primarily among the languages of southern Africa.
The symbol in the International Phonetic Alphabet for a nasal lateral click with a velar rear articulation is ⟨ŋ͡ǁ⟩ or ⟨ŋ͜ǁ⟩, commonly abbreviated to ⟨ŋǁ⟩, ⟨ᵑǁ⟩ or ⟨ǁ̃⟩; a symbol abandoned by the IPA but still preferred by some linguists is ⟨ŋ͡ʖ⟩ or ⟨ŋ͜ʖ⟩, abbreviated ⟨ŋʖ⟩, ⟨ᵑʖ⟩ or ⟨ʖ̃⟩. For a click with a uvular rear articulation, the equivalents are ⟨ɴ͡ǁ,ɴ͜ǁ,ɴǁ,ᶰǁ⟩ and ⟨ɴ͡ʖ,ɴ͜ʖ,ɴʖ,ᶰʖ⟩.
Sometimes the accompanying letter comes after the click letter, e.g. ⟨ǁŋ⟩ or ⟨ǁᵑ⟩; this may be a simple orthographic choice, or it may imply a difference in the relative timing of the releases.[1]
The airstream mechanism is lingual ingressive (also known as velaric ingressive), which means a pocket of air trapped between two closures is rarefied by a "sucking" action of the tongue, rather than being moved by the glottis or the lungs/diaphragm. The release of the forward closure produces the "click" sound. Voiced and nasal clicks have a simultaneous pulmonic egressive airstream.
Its phonation is voiced, which means the vocal cords vibrate during the articulation.
It is a nasal consonant, which means air is exclusively allowed to escape through the nose for nasal stops; otherwise, in addition to through the mouth.
It is a lateral consonant, which means it is produced by directing the airstream over the sides of the tongue, rather than down the middle.
All Khoisan languages, and a few Bantu languages, have glottalized nasal clicks. These are formed by closing the glottis so that the click is pronounced in silence; however, any preceding vowel will be nasalized.
