The word "Kasack" is an outdated spelling of the garment known as a "kossack" or "Cossack." It is believed to have originated from the Russian word "kazak," which refers to a member of a group of warrior horsemen from the 15th century. The correct pronunciation of "kossack" is /ˈkɒsak/, with the stress on the first syllable. The "c" is pronounced as a "k," and the "ck" at the end represents the /k/ sound. Overall, the spelling of "Kasack" is considered incorrect and should be avoided.
The word "Kasack" originates from the French term "casaque", which was borrowed from the Italian word "casacca". In turn, "casacca" derives from the Arabic word "qacaq", meaning a type of soldier's coat or robe. The term was introduced into Europe during the Crusades and referred to a loose-fitting and often sleeveless garment worn as outerwear. Through time, the word "casaque" transformed into "Kasack" in German, maintaining its general meaning of a loose overgarment or smock.