Foil, Foil, Foil and...oh, yes- Foil

I wrapped foil on my foil,
and joined my foils to foil the plot of my nemesis.

I have used the word foil four times in the sentence above. However, it was used to describe/mean different things.

To Foil
The Foil
My foil
Her Foil

What do these words mean, and how do they differ from one another? Immensely!
Foil (food)- A thin, flexible leaf or sheet of metal: aluminum foil
Foil (sword) - A fencing sword
Foil (character) - A character that contrasts with the protagonist, usually having some characteristics in common with the main character
Foil (ruin) - To thwart, or ruin the work of another

These are some of the ways you can use the word foil! Fun isn't it! Use it sometime with your friends- see if they can understand what you're saying!
Interesting!