Sufficient vs Suitable

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

 SufficientSuitable
Meaningenough or adequateRight or good for a particular purpose.
CEFR levelB2B1
Part of speechadjectiveadjective
Usage notesUse 'sufficient' in academic, formal, or professional contexts when discussing resources or conditions. Avoid in casual conversation where simpler terms like 'enough' are more appropriate.Use 'suitable' in contexts where you need to describe something that is appropriate or fitting. It is common in both spoken and written English, but should be avoided in very casual conversations.

Frequently asked questions: Sufficient vs Suitable

What's the difference between "Sufficient" and "Suitable"?

"Sufficient" means: enough or adequate "Suitable" means: Right or good for a particular purpose.

When should I use "Sufficient" and "Suitable"?

They can all be used in everyday English.

Are "Sufficient" and "Suitable" the same CEFR level?

"Sufficient" is at B2, "Suitable" is at B1 on the CEFR scale.

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