The present article analyzes the meaning and form of onomatopoeias in Tjwao, a Khoe-Kwadi (Kalahari Khoe) language. Making use of a prototype approach to categorization, a corpus of 113 onomatopoeic lexemes were tested for their compliance with the semantic, phonetic, and morphological features associated with the prototype of onomatopoeias in scholarly literature. The evidence demonstrates that Tjwao onomatopoeias tend to instantiate the prototype fully. This signifies, in turn, that, as far as their phonetics and morphology are concerned, Tjwao onomatopoeias tend to be extra-systematic.