Tinfoil (noun)

A thin sheet of aluminum or tin that is often used for wrapping food or other items to preserve freshness.

Origin:

A combination of the words "tin" and "foil". tin is a metallic element that is often used in making alloys, while "foil" refers to a thin sheet of metal.

Examples:

1. She wrapped the leftovers in tinfoil and put it in the refrigerator.
2. He wrapped the sandwiches in tinfoil before placing them in his lunchbox.
3. The barbecue chicken was wrapped in tinfoil to keep it warm.
4. She covered the baking dish with tinfoil before putting it in the oven.
5. He wrapped the leftover food in tinfoil to keep it fresh.