The Japanese noun 'コック (kokku)' refers to a 'cook' or 'chef', specifically someone who prepares food professionally. This term is often used in the context of restaurants or kitchens. It is derived from the Dutch word 'kok', which also means 'cook'. For example: The cook is preparing dinner「コックが夕食を準備しています」(コックがゆうしょくをじゅんびしています). I want to become a cook「私はコックになりたいです」(わたしはコックになりたいです). Note that 'コック' is typically used for male cooks, while 'コックさん' or 'シェフ' might be used more generally or respectfully.