Primitive accumulation of capital is like saving up money for something big. Imagine there is a big candy store that you want to go to, but all you have is a few dollars. You could go to the store and buy one or two candies, but that wouldn't be enough for the store's best and biggest candy. So instead, you save up your money and don't spend it until you have enough to buy the really good candy. This is like primitive accumulation of capital. It means saving up your money, or capital, until you have enough to buy something really special or profitable.