Idiot vs Imbecile

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

Idiot

VulgarTop 2,000 (common)C1noun

Imbecile

InformalTop 5,000 (fairly common)
Most formal: ImbecileMost common: Idiot
 IdiotImbecile
Pronunciation🇬🇧 /["/ˈɪdiət/"]/🇺🇸 /["/ˈɪdiət/"]/🇬🇧 //ˈɪmbəsiːl//🇺🇸 //ˈɪmbəˌsiːl//
MeaningA very silly or stupid person.a very stupid person
ExampleWhen I lost my passport, I felt such an idiot.Don't be such an imbecile!
RegisterVulgarInformal
How commonTop 2,000 (common)Top 5,000 (fairly common)
CEFR levelC1-
Part of speechnoun
Collocationsbabbling, big, blithering, be, feel, feel like, make an idiot of yourself, babbling, big, blithering, be, feel, feel like, make an idiot of yourselfcall someone an imbecile, act like an imbecile, feel like an imbecile
Antonymsgenius, smart, intellectgenius, intellect, smart person
Common mistakesUsed in formal writing or speeches., Overused, making it sound less impactful., Confused with 'moron' or 'fool' in severity.Overusing it in serious discussions., Confusing it with 'innocent' or 'ignorant'.
Usage notesConsidered an insult, this word is usually used in informal situations. It's not appropriate in formal contexts or polite conversations. Use caution around friends and family.Used informally, often as an insult. May be considered offensive and is not suitable for formal contexts.

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Idiot
Imbecile

Frequently asked questions: Idiot vs Imbecile

What's the difference between Idiot and Imbecile?

Idiot: A very silly or stupid person. Imbecile: a very stupid person

Which is more formal: Idiot and Imbecile?

Imbecile is the most formal of these.

Which is more common: Idiot and Imbecile?

Idiot is the most common in everyday English.

Can you show an example of each?

Idiot: When I lost my passport, I felt such an idiot. Imbecile: Don't be such an imbecile!

Can I use Idiot and Imbecile interchangeably?

Not always. Idiot and Imbecile 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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