Be cool vs Chill

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

Be cool

InformalTop 2,000 (common)

Chill

InformalTop 2,000 (common)
 Be coolChill
Pronunciation🇬🇧 //biː kuːl//🇺🇸 //bi kul//🇬🇧 //tʃɪl//🇺🇸 //tʃɪl//
MeaningStay calm and relaxed.To relax or calm down.
ExampleJust be cool; everything will turn out fine.Let's chill at my place this weekend.
RegisterInformalInformal
How commonTop 2,000 (common)Top 2,000 (common)
Collocationsbe cool about something, just be cool, be cool under pressurechill out, just chill, chill vibes, chill time, chill with friends
Common mistakesConfused with 'be cruel' - they have opposite meanings., Used in formal contexts - avoid in business meetings., 'Be cool' misused with serious topics - it's too casual.Confusing with 'chilly' which means cool or cold., Using 'chill' in formal contexts like business emails., Misusing 'chill' as a noun instead of a verb.
Usage notesUsed informally to encourage someone to relax or remain calm. Not typically used in formal situations.Use 'chill' in casual conversations. It's informal and not suitable for formal writing or meetings.

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Be cool
Chill

Frequently asked questions: Be cool vs Chill

What's the difference between Be cool and Chill?

Be cool: Stay calm and relaxed. Chill: To relax or calm down.

Can you show an example of each?

Be cool: Just be cool; everything will turn out fine. Chill: Let's chill at my place this weekend.

Can I use Be cool and Chill interchangeably?

Not always. Be cool and Chill 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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