au cas où
\o kɑ.z‿u\
The verdict
“au cas où” is uncommon French (outside the top frequency list), classed as a conjunction. The kind of spelling people second-guess.
- Unranked
- below top-frequency French
- 9
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Dans l’éventualité où ; à supposer que.
| Property | Value |
|---|---|
| Headword | au cas où |
| Language | French |
| Part of speech | Conjunction |
| IPA | \o kɑ.z‿u\ |
| Letters | 9 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “au cas où” sits in French frequency
Rare enough to double-check
au cas où is uncommon French outside the top frequency list, classed as aconjunction, transcribed \o kɑ.z‿u\. Rarity is why readers land here mid-draft. Gloss: "Dans l’éventualité où ; à supposer que.".
au cas où doesn't appear in our generated misspelling index, typically a sign the spelling maps closely to how the word sounds. Our confusable-pair dataset has no match for it, which tends to mean the word is visually distinctive enough to stand on its own.
No documented word history exists for this headword, so its spelling is best explained by sound-to-letter mapping rather than etymology. The correct French form is au cas où, spelled A-U- -C-A-S- -O-Ù.
Definition
- 1Dans l’éventualité où ; à supposer que.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “au cas où”
The practical upshot for anyone who landed here from a spell-check.
- The one correct French spelling is A-U- -C-A-S- -O-Ù - every other letter order is a misspelling in standard orthography.
- Say it as \o kɑ.z‿u\ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more French words and confusable pairs in the same reference. French words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.