invariant

\ɛ̃.va.ʁjɑ̃\

/\ɛ̃.va.ʁjɑ̃\/ adj

The verdict

“invariant” is uncommon French (frequency #58,036 among 3,561 “I” headwords), classed as an adjective. The kind of spelling people second-guess.

#58,036
frequency rank, French
3,561
“I” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Qui ne varie pas.

Corpus desk

Index FR-invariant · invariant · French

invariant · rank #58,036 · 0 variants · 0 confusables

  • FREQ-RARE #58,036
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 3,561
  • PHOTO-FINISH intéressons

Nearest frequency peer: intéressons (-1 rank slots)

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Rangs de longue queue près de « invariant »

Bande clairsemée: les barres inversent le rang pour que le rare se lise plus court

corpus weight

What this shows Vue de longue queue: où « invariant » se situe face à des rangs français aussi rares.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for invariant
PropertyValue
Headwordinvariant
LanguageFrench
Part of speechAdjective
IPA\ɛ̃.va.ʁjɑ̃\
Letters9
Frequency rank#58,036
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Longue queue: rang de « invariant » en français

Cette échelle va du noyau du français courant (gauche) jusqu'à la traîne des formes rares (droite).invarianttombe dans cette queue de rareté:

#1#100#1K#10K#100K
← used constantlyrarely used →

L'échelle est logarithmique (chaque tic ≈ 10× plus rare). Voisins rares de la même bande: « intéressons » (#58,035), « introductif » (#58,034), « intransigeants » (#58,033). Parmi 3,561 lemmes en « I », « invariant » est au #58,036. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

invariant is uncommon French at frequency #58,036 among 3,561 “I” headwords, classed as anadjective, transcribed \ɛ̃.va.ʁjɑ̃\. Rarity is why readers land here mid-draft. Gloss: "Qui ne varie pas.".

We couldn't generate a plausible misspelling set for invariant, a straightforward case of a spelling with little room for common typos. We don't track a confusable pairing for this entry, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.

This entry's etymology isn't recorded, so its spelling is easiest explained by how it's pronounced rather than where it came from. The correct French form is invariant, spelled I-N-V-A-R-I-A-N-T.

Definition

  1. 1
    Qui ne varie pas.

Recorded use

Wiktionary example

These source excerpts show how invariant appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. La différentielle totale d'une fonction de plusieurs variables est invariante dans tout changement de variable.

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); frequency ordering uses the FrequencyWords open word-frequency list (2018 French corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "invariant"?
"invariant" is spelled I-N-V-A-R-I-A-N-T. The IPA pronunciation is \ɛ̃.va.ʁjɑ̃\.
What does "invariant" mean?
As an adjective, "invariant" means: Qui ne varie pas.
How do you pronounce "invariant"?
The IPA (International Phonetic Alphabet) transcription for "invariant" is \ɛ̃.va.ʁjɑ̃\. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "invariant" come from?
"invariant" is a French word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
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.

Similar French words by spelling shape

Same letter count and similar misspelling depth for "invariant", not the corpus desk frequency band.

Same letter count

Frequency-ranked French headwords with 9 letters (nearest by frequency rank).

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

Source: FrequencyWords open word-frequency list