This paper provides a description of the reduplication patterns of Hiaki (also known as Yaqui or Yoeme), based on a corpus of hundreds of reduplicated verbs with example sentences. The various phonological shapes that reduplication can take are described and the morphological, phonological, and lexical factors which affect the particular re- duplicant shape associated with a given verb stem are considered. The primary mean- ings which reduplication can convey are described, including habitual aspect, emphasis, and iteration, as well as a few secondary meanings associated with particular lexical items. It is established that reduplicant shape is not correlated with reduplication mean- ing, with one small subclass of exceptions. Finally, reduplicated forms of complex and compound verbs are discussed, with particular emphasis on their word-internal, head- marking character.