A velar trill or tap is not possible according to the International Phonetics Association: see the shaded boxes on the table of pulmonic consonants.
[7] The only languages recorded to lack velars (and any dorsal consonant at all) may be Xavante, standard Tahitian (though /tVt/ is pronounced [kVt], a pattern also found in the Niihau dialect of Hawaiian), and arguably several Skou languages (Wutung, the Dumo dialect of Vanimo, and Bobe), which have a coda [ŋ] that has been analyzed as the realization of nasal vowels.
An areal feature of the indigenous languages of the Americas of the coastal regions of the Pacific Northwest is that historical *k was palatalized.
When such sounds remained stops, they were transcribed ⟨kʸ⟩ in Americanist phonetic notation, presumably corresponding to IPA ⟨c⟩, but in others, such as the Saanich dialect of Coastal Salish, Salish-Spokane-Kalispel, and Chemakum, *k went further and affricated to [tʃ].
In both regions the languages retain a labialized velar series (e.g. [kʷ], [kʼʷ], [xʷ], [w] in the Pacific Northwest) as well as uvular consonants.
Normal velar consonants are dorso-velar: The dorsum (body) of the tongue rises to contact the velum (soft palate) of the roof of the mouth.
In disordered speech there are also velo-dorsal stops, with the opposite articulation: The velum lowers to contact the tongue, which remains static.