Foil

Noun

Definition: A thin, flexible sheet of metal, typically made of aluminum, used to wrap and cover food.

Definition: A person or thing that contrasts with and enhances the qualities of another.

Synonyms: Wrapper, Covering

Antonyms: Uncovered, Exposed

Examples:

She used foil to wrap the leftovers.
The comedian acted as the perfect foil to the serious news anchor.

Mnemonics:

Imagine a shiny sheet of aluminum foil wrapping your lunch.
Think of a comedic sidekick character that serves as the foil to the main character.

Verb

Definition: To prevent (something considered wrong or undesirable) from succeeding.

Synonyms: Frustrate, Thwart, Hinder

Antonyms: Assist, Facilitate

Examples:

The security measures were in place to foil the attempted robbery.

Mnemonics:

Imagine a hero foiling a villain's evil plan, preventing them from succeeding.

Etymology:

Origin:

Old English "fēol" (leaves, blade of grass), related to Old Norse "fíla" (to cut hair, plait).

Historical Usage:

The word "foil" originally referred to a leaf-like metal primarily used for decoration or ornamentation. Its usage evolved to also include the meaning of preventing something from succeeding.

Related Idioms:

Idiom:

"Foil someone's plans"

Explanation:

To prevent or thwart someone's intentions or goals.

Misconceptions:

Misconception:

Assuming "foil" only refers to the verb form meaning to prevent something from succeeding.

Explanation:

"Foil" can also be a noun referring to a thin sheet of metal used for wrapping food or as a contrast-enhancing element.