Briefly vs Quickly

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

Briefly

Top 2,000 (common)B2adverb

Quickly

Top 1,000 (very common)A1adverb
Most common: Quickly
 BrieflyQuickly
Pronunciation🇬🇧 /["/ˈbriːfli/"]/🇺🇸 /["/ˈbriːfli/"]/🇬🇧 /["/ˈkwɪkli/"]/🇺🇸 /["/ˈkwɪkli/"]/
MeaningFor a short time or in a few words.In a fast manner
ExampleHe had spoken to Emma **only briefly**.She ran quickly to catch the bus.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR levelB2A1
Part of speechadverbadverb
Collocationsexplain briefly, discuss briefly, mention brieflymove quickly, react quickly, think quickly
Antonymslengthily, extensivelyslowly
Common mistakesUsing 'brief' instead of 'briefly' (confusing the adjective and adverb)., Saying 'briefly discuss' when 'discuss briefly' is more natural., Misplacing it in a sentence so that it doesn't clearly modify the verb.Using 'quick' instead of 'quickly' when modifying a verb., Placing 'quickly' too far from the verb it modifies., Confusing 'quickly' with 'fastly' since 'fast' is the correct adverb.
Usage notesUse 'briefly' when you want to indicate that something is short or to the point. It's suitable for formal and informal contexts. Avoid it when you need to describe something in detail.Use 'quickly' when describing how something is done fast. Appropriate in both spoken and written English, but may be overly formal in casual conversations.

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Quickly

Frequently asked questions: Briefly vs Quickly

What's the difference between Briefly and Quickly?

Briefly: For a short time or in a few words. Quickly: In a fast manner

Which is more common: Briefly and Quickly?

Quickly is the most common in everyday English.

Which is more advanced: Briefly and Quickly?

Briefly is the highest level, at B2, on the CEFR scale.

Are Briefly and Quickly the same CEFR level?

Briefly: B2, Quickly: A1 on the CEFR scale.

What part of speech are Briefly and Quickly?

Briefly: adverb, Quickly: adverb.

Can you show an example of each?

Briefly: He had spoken to Emma **only briefly**. Quickly: She ran quickly to catch the bus.

Can I use Briefly and Quickly interchangeably?

Not always. Briefly and Quickly 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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