Buy food necessary.
Meaning: This means to purchase only the food that is needed for nourishment, and not to buy things that are not essential. It's like saying, Only buy the food that you need to eat.
Choice of Words: Buy is a verb that means to acquire something in exchange for money, and food is a noun that refers to something that is eaten to sustain life. In this context, necessary is an adjective that means required or essential. Together, they convey the idea that one should only buy the food that is required for survival and not waste money on unnecessary items.
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Related Expressions