Ka-tzetnik

Ka-tzetnik (KZ-nik, Kazetnik, Katsetnik) is a Yiddish word for an inmate of a Nazi concentration camp. The word is derived from the abbreviation KZ (pronounced as Kah-Tzet) for the German word Konzentrationslager by the addition of the suffix -nik of Slavic origin, which approximately corresponds to the English suffix "-er".

One Holocaust survivor, writer-historian Yehiel De-Nur, wrote his books under a penname Ka-Tzetnik 135633; 135633 was his Nazi camp designation. His work documents the history of Nazi atrocities.