Final answer:
The initials NSDAP in the infamous political group led by Adolf Hitler stand for Nationalsozialistische Deutsche Arbeiterpartei, which is the National Socialist German Workers' Party in English.
Step-by-step explanation:
The group Adolf Hitler led was the National Socialist German Workers' Party, which is represented by the initials NSDAP. These letters stand for Nationalsozialistische Deutsche Arbeiterpartei, which translates to National Socialist German Workers' Party in English. The party, often abbreviated as the Nazi Party, was responsible for adopting the swastika as its symbol and espoused ideals of extreme nationalism, racial supremacy, and the dictatorship of Adolf Hitler. The NSDAP distinguished itself from other political groups with its focus on Aryan race dominance, intense anti-Semitism, and opposition to both Communism and the Weimar Republic.