
What, where, who, why, etc. the devil…
Surprise Factor
Expresses shock or unexpectedness of a situation or action.

What the devil! You scared me!
Annoyance Emphasis
Highlights irritation or frustration with someone or something.

Where the devil are my keys?
Disbelief Tone
Used when something is hard to believe or accept.

How the devil did you solve that?
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