What is this vs What the hell is this

When to use each in English, with meaning, register, and examples.

What is this

Top 2,000 (common)

What the hell is this

InformalTop 5,000 (fairly common)
Most formal: What is thisMost common: What is this
 What is thisWhat the hell is this
Pronunciation🇬🇧 //wɒt ɪz ðɪs//🇺🇸 //wɑt ɪz ðɪs//🇬🇧 //wɒt ðə hɛl ɪz ðɪs//🇺🇸 //wɑt ðə hɛl ɪz ðɪs//
MeaningA question asking about the identity of something.An expression of surprise or confusion about something.
ExampleExcuse me, **what is this** on the table?I opened the box and said, 'what the hell is this?'
RegisterNeutralInformal
How commonTop 2,000 (common)Top 5,000 (fairly common)
Collocationswhat is this thing, what is this about, what is this supposed to bewhat the hell is, what the hell happened, what the hell are you doing
Antonyms-What a wonderful thing this is, This is amazing, I love this
Common mistakesOmitting 'is', saying 'what this?' instead, Using 'who' instead of 'what' for inanimate objectsUsing in formal contexts where it's inappropriate., Mispronouncing 'hell' as 'heel'.
Usage notesUsed when you want clarification about an object or situation. Appropriate in both casual and formal contexts.Use this phrase when you are surprised or angry. It's informal, so avoid it in formal situations.

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What is this
What the hell is this

Frequently asked questions: What is this vs What the hell is this

What's the difference between What is this and What the hell is this?

What is this: A question asking about the identity of something. What the hell is this: An expression of surprise or confusion about something.

Which is more formal: What is this and What the hell is this?

What is this is the most formal of these.

Which is more common: What is this and What the hell is this?

What is this is the most common in everyday English.

Can you show an example of each?

What is this: Excuse me, **what is this** on the table? What the hell is this: I opened the box and said, 'what the hell is this?'

Can I use What is this and What the hell is this interchangeably?

Not always. What is this and What the hell is this are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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