au cas que

[o kɑ.kə]

/[o kɑ.kə]/ phrase

The verdict

“au cas que” is outside the top-ranked Spanish vocabulary, used as a phrase - the kind of word writers most often double-check.

Unranked
below top-frequency Spanish
10
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - En caso de que o por si acaso.

Key facts for au cas que
PropertyValue
Headwordau cas que
LanguageSpanish
Part of speechPhrase
IPA[o kɑ.kə]
Letters10
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “au cas que” sits in Spanish frequency

au cas que falls outside the top-100,000 ranked Spanish words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The Spanish entry for au cas que is 10 letters long, classified as a phrase, and transcribed in the International Phonetic Alphabet as [o kɑ.kə]. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. The dominant gloss from Wiktionary reads: "En caso de que o por si acaso.".

No misspelling variants are generated for au cas que in our index, suggesting the orthography follows predictable Spanish patterns. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

No explicit etymology string is stored for this entry, so spelling patterns must be inferred from the word's phoneme-to-grapheme mapping rather than from a documented borrowing chain. For readers arriving here from a spelling check, the authoritative guidance is: the correct Spanish form is au cas que, spelled A-U- -C-A-S- -Q-U-E, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.

Definition

  1. 1
    En caso de que o por si acaso.

Synonyms

au cas oùdans le cas oùen cas 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.

Cite this page

Free to reuse with attribution (CC BY-SA). Copy the citation:

PlainSpell, “au cas que, Spanish word data” (May 6, 2026). Derived from Wiktionary (kaikki.org, CC BY-SA) and an open word-frequency list. https://plainspell.com/es/palabra/au-cas-que

Frequently Asked Questions

How do you spell "au cas que"?
"au cas que" is spelled A-U- -C-A-S- -Q-U-E. The IPA pronunciation is [o kɑ.kə].
What does "au cas que" mean?
As a phrase, "au cas que" means: En caso de que o por si acaso.
How do you pronounce "au cas que"?
The IPA (International Phonetic Alphabet) transcription for "au cas que" is [o kɑ.kə]. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "au cas que" come from?
"au cas que" is a Spanish word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Using “au cas que”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct Spanish spelling is A-U- -C-A-S- -Q-U-E - every other letter order is a misspelling in standard orthography.
  • Say it as [o kɑ.kə] (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Browse more Spanish words and confusable pairs in the same reference. Spanish words

Nearby Spanish words

Other entries that begin with the letter A in our Spanish index:

Explore PlainSpell

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.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list