Voiceless velar implosive

A voiceless velar implosive is a very rare consonantal sound. The symbol for this sound in the International Phonetic Alphabet is ⟨ɠ̊⟩ or ⟨kʼ↓⟩. A dedicated IPA letter, ⟨ƙ⟩, was withdrawn in 1993.

Features
Features of the voiceless velar implosive:

Occurrence
A phonemic has not been confirmed for any language. It has been claimed for Lendu, but it is more likely to be creaky-voiced, as in Hausa. Some English speakers use a voiceless velar implosive to imitate the "glug-glug" sound of liquid being poured from a bottle, though others use a voiced implosive [] or an uvular one [].

In Uspantek, and perhaps other Mayan languages of Guatemala, is a rare allophone of. Of the consonants with glottalic airstream, the labial and uvular vary as ~  and  ~, depending on the position in the word. In contrast, the velar is nearly always, but speakers have been recorded using.