approfondievsapprofondirTell them apart

Quick tell: approfondie is a adjective, approfondir is a verb, so they fill different roles in a sentence.

Which to use

“approfondie” is an adjective and “approfondir” is a verb - they look or sound alike but fill different roles in a sentence.

#12,516
“approfondie” frequency rank
#10,824
“approfondir” frequency rank
23340
confusion score

Side-by-Side Comparison

Feature approfondie approfondir
Definition Féminin singulier de approfondi. Rendre plus profond, creuser plus avant.

Where the eye mixes approfondie and approfondir

Muted = shared; highlighted = the visual trap. They share 10 letters in sequence. approfondie (VCCCVCVCCVV) and approfondir (VCCCVCVCCVC) run the same length but a different consonant-vowel pattern - the shape difference is usually the fastest tell.

11 ch
approfondie
11 ch
approfondir

Look-alike desk: approfondie vs approfondir

These two trip readers on the page rather than in the ear: approfondie is \a.pʁɔ.fɔ̃.di\ while approfondir is \a.pʁɔ.fɔ̃.diʁ\. Spoken aloud the problem disappears. In writing it persists, because they differ by a single letter - e in “approfondie” becomes r in “approfondir”, and the parts of speech differ too (adjective vs verb), which is usually the fastest check. Our composite confusion score for this pair is 23340, derived from the frequency rank of both members and their visual similarity.

approfondie is recorded at frequency rank #12,516, classified as anadj, pronounced \a.pʁɔ.fɔ̃.di\. approfondir is at rank #10,824, tagged as averb, pronounced \a.pʁɔ.fɔ̃.diʁ\.

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 23340, this pair ranks #353,078 of 440,172 scored French confusable pairs - a relatively easy-to-tell-apart pair.

Orthographic DNA of approfondie vs approfondir

Shared letters: adfinopr. Private to "approfondie": e. Private to "approfondir": -.

"approfondie" · 11 letters · shape VCCCVCVCCVV  ·  "approfondir" · 11 letters · shape VCCCVCVCCVC

Known mistypes of this pair

  • approfondie ← apporfondie · apprfoondie · approffondie · approfnodie · approfodnie · approfonddie · approfondei · approfonide
  • approfondir ← apporfondir · apprfoondir · approffondir · approfnodir · approfodnir · approfonddir · approfondirr · approfondri

Frequently Asked Questions

Is swapping "approfondie" for "approfondir" ever safe?
No - they are not even the same part of speech. "approfondie" is an adjective and "approfondir" a verb, so a sentence built for one is usually ungrammatical with the other.
In ordinary French text, does "approfondie" or "approfondir" show up more?
"approfondir" is the more common of the two: it sits at frequency rank #10,824 in our French list, against #12,516 for "approfondie". The two are close in frequency, so neither is a safe default; check the meaning rather than guessing.

After this comparison

Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.

  • Full dictionary entry for "approfondie" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "approfondir" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #353,078 of 440,172 scored French confusable pairs in this corpus vintage. Corpus statistics
  • "approfondie" and "approfondir" also get mixed up with nearby pairs, the highest-scored neighbour is "approfondie vs approfondit". 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 #353,078 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