ISF
\i ɛ.s‿ɛf\
The verdict
“ISF” sits in 20 confusable pairs (corpus #17,462) as a proper noun. The look-alike neighbours are the real trap.
- #17,462
- frequency rank, French
- 3,561
- “I” headwords
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Impôt déclaratif payé par les personnes physiques, célibataires ou en couple, possédant un patrimoine imposable dont la valeur nette est supérieure à un seuil fixé par la loi.
Corpus desk
Index FR-isf · ISF · French
ISF · rank #17,462 · 0 variants · 20 confusables
- FREQ-MID #17,462
- LEN-MID 3 letters
- VOW-1 1 vowel
- CONFUS-HIGH 20 pairs
- VAR-0 0 variants
- BOOK-MID 3,561
- PHOTO-FINISH intoxication
Nearest frequency peer: intoxication (-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.
Frequency neighbourhood for “ISF”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- instantané
instantané
82,542 corpus weight
- intoxication
intoxication
82,540 corpus weight
- ISF
ISF
82,539 corpus weight
- islamiques
islamiques
82,538 corpus weight
- Kai
Kai
82,537 corpus weight
- Kremlin
Kremlin
82,536 corpus weight
What this shows Bars show where “ISF” sits against the nearest ranked French headwords in the FrequencyWords band, not a reprint of letter-browse containment.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | ISF |
| Language | French |
| Part of speech | Proper noun |
| IPA | \i ɛ.s‿ɛf\ |
| Letters | 3 |
| Frequency rank | #17,462 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “ISF” sits in French frequency
Easy to mix with look-alikes
The spelling risk for ISF is neighbouring look-alikes ("it", "ix", …), not just typos; it is aproper noun pronounced \i ɛ.s‿ɛf\. Frequency #17,462 among 3,561 “I” headwords. Gloss: "Impôt déclaratif payé par les personnes physiques, célibataires ou en couple, possédant un patrimoine imposable dont la valeur nette est supérieure à un seuil fixé par la loi.".
The misspelling generator found no plausible variants for ISF, suggesting the orthography follows predictable French patterns. It also participates in 20 confusable-pair relationships, "it", "ix", "iu", and more, where similar look or sound leads writers to substitute one word for another in context.
This headword's origin isn't recorded in our source data, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct French form is ISF, spelled I-S-F.
Definition
- 1Impôt déclaratif payé par les personnes physiques, célibataires ou en couple, possédant un patrimoine imposable dont la valeur nette est supérieure à un seuil fixé par la loi.
Recorded use
Wiktionary examplesThese source excerpts show how ISF appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
L’ISF trouve globalement ses défenseurs à gauche et ses détracteurs à droite dans le monde politique français.
Vous êtes imposable à l'ISF si votre patrimoine net taxable est supérieur à 1,3 million d’euros au 1ᵉʳ janvier 2013.
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.
PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 3, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.
Frequently Asked Questions
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Similar French words by spelling shape
Same letter count and similar misspelling depth for "ISF", not the corpus desk frequency band.
Same letter count
Frequency-ranked French headwords with 3 letters (nearest by frequency rank).
What to do next
You've looked up "ISF". Here's where to go from here.
- "ISF" maps to 20 confusable pairs in this vintage; the highest-scored is "it". View pair
- Usage frequency rank #17,462 among French headwords in this corpus. Corpus statistics
- Browse more French words in the "I" letter cohort. I–Z browse
PlainSpell is a reference corpus, not spelling advice. Verify unusual forms in context.
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.