B2 Expression Neutral

De fond en comble

Thoroughly; From top to bottom

Meaning

Completely, entirely.

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Cultural Background

The phrase is linked to the 'Grand Ménage de Printemps', a traditional deep-cleaning of the home after winter. In Quebec, the phrase is used identically to France, though you might also hear 'au complet' in more casual settings. Belgian French uses this expression frequently in administrative and political contexts to describe reforms. The 'combles' are a specific architectural feature in France, often referring to the space under a sloped roof.

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Use with 'Fouiller'

The verb 'fouiller' (to search/rummage) is the best friend of this phrase. They are used together in almost every detective story.

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Not for People

Don't say you know someone 'de fond en comble'. Use 'par cœur' or 'très bien' instead.

Meaning

Completely, entirely.

💡

Use with 'Fouiller'

The verb 'fouiller' (to search/rummage) is the best friend of this phrase. They are used together in almost every detective story.

⚠️

Not for People

Don't say you know someone 'de fond en comble'. Use 'par cœur' or 'très bien' instead.

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Business Context

In a job interview, saying you've researched the company 'de fond en comble' sounds very professional and dedicated.

Test Yourself

Complete the sentence with the correct phrase.

J'ai cherché mes lunettes de ____ en ____.

✓ Correct! ✗ Not quite. Correct answer: fond / comble

The standard expression is 'de fond en comble'.

Which sentence uses the phrase correctly?

Choose the correct usage:

✓ Correct! ✗ Not quite. Correct answer: Elle a révisé son examen de fond en comble.

It can be used for thoroughly reviewing a document or subject.

Fill in the missing part of the dialogue.

A: Tu as fini de nettoyer la cuisine ? B: Oui, je l'ai faite ________.

✓ Correct! ✗ Not quite. Correct answer: de fond en comble

In the context of cleaning, 'de fond en comble' is the most natural way to say 'thoroughly'.

Match the situation to the best use of the phrase.

Match: 1. Police search, 2. Restructuring a bank, 3. Spring cleaning.

✓ Correct! ✗ Not quite. Correct answer: All of the above

The phrase is versatile and fits all these 'thorough' scenarios.

🎉 Score: /4

Visual Learning Aids

Practice Bank

4 exercises
Complete the sentence with the correct phrase. Fill Blank A2

J'ai cherché mes lunettes de ____ en ____.

✓ Correct! ✗ Not quite. Correct answer: fond / comble

The standard expression is 'de fond en comble'.

Which sentence uses the phrase correctly? Choose B1

Choose the correct usage:

✓ Correct! ✗ Not quite. Correct answer: Elle a révisé son examen de fond en comble.

It can be used for thoroughly reviewing a document or subject.

Fill in the missing part of the dialogue. dialogue_completion B1

A: Tu as fini de nettoyer la cuisine ? B: Oui, je l'ai faite ________.

✓ Correct! ✗ Not quite. Correct answer: de fond en comble

In the context of cleaning, 'de fond en comble' is the most natural way to say 'thoroughly'.

Match the situation to the best use of the phrase. situation_matching B2

Match: 1. Police search, 2. Restructuring a bank, 3. Spring cleaning.

✓ Correct! ✗ Not quite. Correct answer: All of the above

The phrase is versatile and fits all these 'thorough' scenarios.

🎉 Score: /4

Frequently Asked Questions

10 questions

No, the order is fixed. It always goes from the bottom (fond) to the top (comble).

Not at all. It's very common in casual speech when talking about cleaning or looking for things.

Yes, 'les combles' is the word for the attic space under the roof.

Yes, but 'en détail' or 'd'un bout à l'autre' is more common for reading.

No, it is silent: /fɔ̃/.

The opposite would be 'superficiellement' (superficially) or 'en surface'.

No, that would sound very strange and possibly medical or invasive.

Yes, especially when discussing project reviews or audits.

It means 'that's the limit' or 'that's ironic/outrageous'. It's a different idiom.

Yes, 'à fond' is a shorter, more common alternative in daily life.

Related Phrases

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De long en large

similar

Back and forth / In great detail

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De part en part

similar

All the way through

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À fond

builds on

Completely / To the max

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Entièrement

synonym

Entirely

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Passer au peigne fin

similar

To go through with a fine-tooth comb

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