Velar stop

From Teflpedia

A velar stop (/ˈvi:ˈlɑ:(r) ˈstɒp/) is a consonant sound which in manner of articulation is a plosive and in place of articulation is a velar consonant.

They are formed made with the back of the tongue in contact with the soft palate (also known as the velum, hence velar), held tightly enough to block the passage of air. There are two of these in the standard English phonemes, which form a consonant pair; the unvoiced velar stop /k/ and the voiced velar stop /g/.