improbable
/ɪmˈpɹɑbəbl̩/
"improbable" is a 10-letter English headword indexed on PlainSpell.
The verdict
“improbable” is a moderately-common English word, ranked #19,865 in English word frequency and used as an adjective.
- #19,865
- frequency rank, English
- 10
- letters
- 16
- tracked misspellings
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Not likely to be true.
| Property | Value |
|---|---|
| Headword | improbable |
| Language | English |
| Part of speech | Adjective |
| IPA | /ɪmˈpɹɑbəbl̩/ |
| Letters | 10 |
| Frequency rank | #19,865 |
| Misspellings tracked | 16 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “improbable” sits in English frequency
Spelling & Dictionary Insight
The English entry for improbable is 10 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ɪmˈpɹɑbəbl̩/. Corpus data places it at rank #19,865 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 16 likely wrong-spelling variants for improbable, with forms such as "immprobable", "imporbable", and "impprobable". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. No confusable counterpart is on file for this word, since nothing in our dataset looks or sounds close enough to cause mix-ups.
Etymologically, the entry records: Borrowed from Latin improbābilis. By surface analysis, im- + probable. The correct English form is improbable, spelled I-M-P-R-O-B-A-B-L-E.
Definition
- 1Not likely to be true.
- 2Not likely to happen.
Etymology
Borrowed from Latin improbābilis. By surface analysis, im- + probable.
Antonyms
This word in other languages
Common misspellings
Also misspelled as: immprobable,imporbable,impprobable,imprboable,improabble,improbabble,improbabel,improbablle,improbalbe,improbbable,improbbale,improbible,imprrobable,imrpobable,ipmrobable,miprobable
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of improbable - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
How do you spell "improbable"?
What does "improbable" mean?
What are common misspellings of "improbable"?
How do you pronounce "improbable"?
What is the origin of the word "improbable"?
Is PlainSpell free to use?
Using “improbable”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-M-P-R-O-B-A-B-L-E - every other letter order is a misspelling in standard orthography.
- Say it as /ɪmˈpɹɑbəbl̩/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Browse more English words and confusable pairs in the same reference. English 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.