A documentary-style narration: origin, meaning, and feel.
Part of speech
noun and verb
Pronunciation
FOYL /fɔɪl/
Definition
As a noun: a very thin sheet of metal, especially aluminium or tin foil; a character who contrasts with another to highlight their qualities; a light fencing sword. As a verb: to prevent someone from succeeding with their plan; to thwart.
Plain meaning
Foil as a noun is the thin metallic sheet in your kitchen, or a character who makes the hero look better by contrast. As a verb: to foil means to thwart or defeat a plan.
Register
The metallic sense is neutral and everyday. The literary sense is standard in critical and educational writing. The verb is neutral and used in formal and informal contexts.
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Podcast 2 · Daily Use
Two British voices, real conversation
Foil used naturally — examples, mistakes to avoid, close synonyms.
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Podcast 3 · Prompt Engineering
Using "Foil" in AI prompts
An instructor and student walk through real, copy-ready developer prompts.
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