Definition

A type of lightweight sword used in fencing, or a thin sheet of metal used for wrapping or covering food.

Example

She used a foil to wrap the leftovers from dinner.

Conversation

Have you ever tried using a foil for your cooking?

Yeah, I use it all the time to keep things from sticking.

Exactly! It makes cleanup so much easier when you line the pan with foil.

Right? Plus, it helps keep the food moist while baking.

Synonyms & Antonyms

Definition

To prevent someone from achieving their goal or to stop something from happening successfully.

Example

The detective was able to foil the criminal's plan to rob the bank.

Tense Forms

Conversation

Did you hear how they tried to stop our plans?

Yeah, but I think they just foiled themselves in the process.

Exactly! Their attempts just made us more determined.

Root Explanation

Foil originates from Old French *foile*, meaning a leaf or thin sheet. The word refers to a thin layer or sheet of material, often used to cover or wrap something.

Memory Tip

Think of a thin 'leaf' or 'sheet' ('foile') that covers or wraps something — that's why foil is used for wrapping food.

Visually Confused Words