ab initio
\a.b‿i.ni.sjo\
The verdict
“ab initio” is outside the top-ranked French vocabulary, used as an adverb - the kind of word writers most often double-check.
- Unranked
- below top-frequency French
- 9
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - « Raconté depuis le début », en opposition à in medias res signifiant « commencer au milieu de l’histoire ».
| Property | Value |
|---|---|
| Headword | ab initio |
| Language | French |
| Part of speech | Adverb |
| IPA | \a.b‿i.ni.sjo\ |
| Letters | 9 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “ab initio” sits in French frequency
Spelling & Dictionary Insight
The French entry for ab initio is 9 letters long, classified as an adverb, and transcribed in the International Phonetic Alphabet as \a.b‿i.ni.sjo\. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. Wiktionary records 7 distinct senses for this headword, so context determines which meaning a reader should apply.
Our edit-distance generator produced no likely misspellings for ab initio, a straightforward case of a spelling with little room for common typos. No confusable counterpart is on file for this word, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
This headword's origin isn't recorded in our source data, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct French form is ab initio, spelled A-B- -I-N-I-T-I-O.
Definition
- 1« Raconté depuis le début », en opposition à in medias res signifiant « commencer au milieu de l’histoire ».
- 2Littéralement « dès son initiation », en parlant d’un événement qui relève du juridique (acte, contrat, loi…). En général ce terme est employé pour évoquer la rétroactivité d’une déclaration de nullité d’un acte juridique.
- 3Un calcul est qualifié de calcul ab initio (ou depuis les premiers principes) s’il est reposé sur les lois physiques de base et établies sans postulats additionnels ou modèles spéciaux.
- 4Abréviation référant aux méthodes ab initio de chimie quantique.
- 5Méthode pour la prédiction des structures protéiques lors d’un repliement de protéine.
- 6Première étape de l’entraînement au vol.
- 7Partie de certaines qualifications scolaires : les langues étrangères peuvent être appréhendées ab initio — pour les débutants.
Synonyms
This word in other languages
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 “ab initio”
The practical upshot for anyone who landed here from a spell-check.
- The one correct French spelling is A-B- -I-N-I-T-I-O - every other letter order is a misspelling in standard orthography.
- Say it as \a.b‿i.ni.sjo\ (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.