How do you say food in French?

Food is "la nourriture" (fem.) in French, you say it noor-e-toor
Food is not a French Word. If you mean "What is the French Word for food?" then the answer is nourriture.

Also a physical food item is "un aliment" and the prepared of cooked food (cooking) of a particular culture is "la cuisine". (The Word cuisine is widely used in English, too).