impensablevsimprenableWhich spelling fits?

Which to use

“impensable” and “imprenable” are a confusable French pair: similar on the page, but distinct in meaning, check the gloss before you choose.

#17,452
“impensable” frequency rank
#26,755
“imprenable” frequency rank
44207
confusion score

Side-by-Side Comparison

Feature impensable imprenable
Definition Qui ne peut pas être compris par la pensée. Qui ne peut être pris, en parlant de villes, de forteresses, etc., que l'on ne peut pas conquérir.

Where the eye mixes impensable and imprenable

Muted = shared; highlighted = the visual trap. They share 9 letters in sequence.

10 ch
impensable
10 ch
imprenable

Visual trap between impensable and imprenable

A purely visual mix-up. impensable (\ɛ̃.pɑ̃.sabl\) and imprenable (\ɛ̃.pʁə.nabl\) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they share most of their letters but differ in 3 positions. Our composite confusion score for this pair is 44207, derived from the frequency rank of both members and their visual similarity.

impensable is recorded at frequency rank #17,452, classified as anadj, pronounced \ɛ̃.pɑ̃.sabl\. imprenable is at rank #26,755, tagged as anadj, pronounced \ɛ̃.pʁə.nabl\.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 44207, this pair ranks #212,227 of 440,172 scored French confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of impensable vs imprenable

Shared letters: abeilmnp. Private to "impensable": s. Private to "imprenable": r.

"impensable" · 10 letters · shape VCCVCCVCCV  ·  "imprenable" · 10 letters · shape VCCCVCVCCV

Known mistypes of this pair

  • impensableimepnsable · immpensable · impenasble · impennsable · impensabble · impensabel · impensablle · impensalbe
  • imprenableimmprenable · impernable · impprenable · impreanble · imprenabble · imprenabel · imprenablle · imprenalbe

Frequently Asked Questions

Is swapping "impensable" for "imprenable" ever safe?
No. They are said differently (\ɛ̃.pɑ̃.sabl\ versus \ɛ̃.pʁə.nabl\) and carry different meanings; reading the sentence aloud is usually enough to catch the wrong one.
In ordinary French text, does "impensable" or "imprenable" show up more?
"impensable" is the more common of the two: it sits at frequency rank #17,452 in our French list, against #26,755 for "imprenable". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

Useful next steps

Eye-level mix-up between "impensable" and "imprenable" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "impensable" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "imprenable" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #212,227 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "impensable" and "imprenable" also get mixed up with nearby pairs, the highest-scored neighbour is "impensable vs imposable". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #212,227 of 440,172 scored French pairs, corpus vintage 2026-09-03, not spelling advice.

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

Source: FrequencyWords open word-frequency list