Van Der Auwera, JohanVossen, Frens2015-10-122015-10-121836-6821http://hdl.handle.net/1885/15866The paper deals with the verb embracing double negation found in both Chamic and Bahnaric languages and with the question how it developed. We propose both an internal and external explanation. The former relates to what is called a ‘Jespersen Cycle’, a hypothesis about the renewal of single negation out of double negation, itself developing out of another single negation. The latter is language interference from Chamic to Bahnaric. We argue that the Jespersen Cycle hypothesis is more plausible for Chamic, thus revisiting Lee (1996), and that the language contact hypothesis makes more sense for Bahnaric, thus supporting a more general hypothesis about the direction of interference between the two families (Sidwell 2008: 261, 265).Copyright vested in the author; released under Creative Commons Attribution LicencenegationJespersen Cyclelanguage contact2015