Kwʼadza (Qwadza), or Ngomvia, is an extinct Afroasiatic language formerly spoken in Tanzania in the Mbulu District. The last speaker died sometime between 1976 and 1999.^[1]

Kwʼadza is poorly attested, and apart from perhaps being close to Aasax, its classification is not certain. Although it has a large number of identifiably Cushitic roots, the non-Cushitic numerals itame 'one' and beʼa ~ mbɛa 'two' suggest a connection with Hadza, while haka 'four' suggests a connection with Sandawe. It is possible that Kwʼadza borrowed e.g. 'four' from Sandawe, but also that it was a non-Cushitic language whose speakers were undergoing language shift to Cushitic when it was recorded.^{[citation needed]}

The phonology is not certain, but the following has been suggested (Ehret 1980):