Original: The term Nazi is derived from the first two syllables of Nationalsozialistische Deutsche Arbeiterpartei, The German name of the Nazi Party ("National-Socialist German Workers’ Party") is the Nationalsozialistische Deutsche Arbeiterpartei, pronounced  (Arbeiter "worker").
Simplified: The word Nazi is a short for Nationalsozialist (supporter of the Nationalsozialistische Deutsche Arbeiterpartei) in the German language.