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Titre : The French Word "Devoir" — Etymology & DELF B2 Usage
Slug : etymology-french-word-devoir-delf-b2
Meta desc: Why does devoir mean both “must” and “homework”? Discover the Latin roots of this essen...
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Etymology
The French Word "Devoir" — Etymology & DELF B2 Usage
By PASS DELF · Etymology Series · June 2026 · 5 min read
Why does devoir mean both “must” and “homework”? Discover the Latin roots of this essential DELF B2 word and how to use it correctly at the exam.
Where Does “Devoir” Come From?
The word devoir comes from the Latin verb debere, meaning to owe. In ancient Rome, debere described a financial or moral obligation: you owed money, you owed loyalty, you owed service.
Over centuries, as Latin evolved into Old French, debere became deveir, then devoir. The core meaning survived intact: devoir always implies something that is owed — a duty, an obligation, a moral responsibility.
This is why, in modern French, devoir carries two distinct meanings that are actually one and the same:
Over centuries, as Latin evolved into Old French, debere became deveir, then devoir. The core meaning survived intact: devoir always implies something that is owed — a duty, an obligation, a moral responsibility.
This is why, in modern French, devoir carries two distinct meanings that are actually one and the same:
- The verb devoir → to have to, must, should
- Le devoir (noun) → duty, homework, written assignment
Why This Matters for DELF B2
At the DELF B2, examiners evaluate your ability to express nuance and modality. The verb devoir is one of the most tested modal verbs precisely because it changes meaning depending on the tense.
| Tense | Form | Meaning | Example |
|---|---|---|---|
| Present | il doit | obligation | Il doit partir maintenant. |
| Conditionnel présent | il devrait | recommendation | Tu devrais réviser davantage. |
| Conditionnel passé | il aurait dû | regret | Elle aurait dû écouter. |
| Imparfait | il devait | past supposition | Il devait être fatigué. |
Key Phrases to Use at the Exam
Production Écrite (B2)
“Il convient de souligner que chacun devrait assumer ses responsabilités.”
Production Orale (B2)
“On aurait dû agir bien plus tôt face à cette situation.”
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