Cool MateBrilliant vs You're a genius
When to use each in English, with meaning, register, and examples.
Brilliant
Top 1,000 (very common)A2adjective
You're a genius
InformalTop 2,000 (common)
Most formal: BrilliantMost common: Brilliant
| Brilliant | You're a genius | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/ˈbrɪliənt/"]/🇺🇸 /["/ˈbrɪliənt/"]/ | 🇬🇧 //jʊəəˈdʒiː.ni.əs//🇺🇸 //jʊr ə ˈdʒin.jəs// |
| Meaning | Very bright or smart. | You are very smart. |
| Example | That was a brilliant performance by the actor. | After solving the puzzle so quickly, I said, 'You're a genius!' |
| Register | Neutral | Informal |
| How common | Top 1,000 (very common) | Top 2,000 (common) |
| CEFR level | A2 | - |
| Part of speech | adjective | |
| Collocations | be, look, just, really, truly, at, be, look, just, really, truly, at, be, look, just, really, truly, at | call someone a genius, you're such a genius, act like a genius |
| Antonyms | dull, dim, stupid | - |
| Common mistakes | 'Brilliant' is often confused with 'good' – 'brilliant' conveys a much stronger positive meaning., Some learners use 'brilliant' as a verb instead of an adjective., Mixing it up with 'brilliance', which is a noun. | Confused with 'you're a genius' as an insult instead of a compliment., Using it in formal situations where modesty is expected., Overusing it, making it sound insincere. |
| Usage notes | Use 'brilliant' to describe something very intelligent or something that shines brightly. It's suitable for both formal and informal contexts but may sound overly grand in casual situations. | Used informally to compliment someone's intelligence. Typically used in friendly contexts and may sound exaggerated. |
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Frequently asked questions: Brilliant vs You're a genius
What's the difference between Brilliant and You're a genius?
Brilliant: Very bright or smart. You're a genius: You are very smart.
Which is more formal: Brilliant and You're a genius?
Brilliant is the most formal of these.
Which is more common: Brilliant and You're a genius?
Brilliant is the most common in everyday English.
Can you show an example of each?
Brilliant: That was a brilliant performance by the actor. You're a genius: After solving the puzzle so quickly, I said, 'You're a genius!'
Can I use Brilliant and You're a genius interchangeably?
Not always. Brilliant and You're a genius 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.