improbable

/ɪmˈpɹɑbəbl̩/

//ɪmˈpɹɑbəbl̩// adj

By · According to Wiktionary data (CC BY-SA) ·

"improbable" is a 10-letter English headword indexed on PlainSpell.

The verdict

“improbable” has 16 generated spelling variants in the English index at frequency #19,865. The variants make it a useful spelling check.

#19,865
frequency rank, English
2,140
“I” headwords
16
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Not likely to be true.

Corpus desk

Index EN-improbable · improbable · English

improbable · rank #19,865 · 16 variants · 0 confusables

  • FREQ-MID #19,865
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 16 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH impulses

Nearest frequency peer: impulses (+1 rank slots)

Read with this headword: Spelling guide for this pattern

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.

Rank peers near misspelling magnet “improbable”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “improbable” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for improbable
PropertyValue
Headwordimprobable
LanguageEnglish
Part of speechAdjective
IPA/ɪmˈpɹɑbəbl̩/
Letters10
Frequency rank#19,865
Misspellings tracked16
Confusable pairs0
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “improbable”

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).improbablelands here:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “impulses” (#19,866), “imitate” (#19,863), “iggy” (#19,862). Among 2,140 “I” headwords, “improbable” is #19,865. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 16 spelling variants around improbable (IPA /ɪmˈpɹɑbəbl̩/), anadjective. Corpus frequency is #19,865 among 2,140 “I” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

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

  1. 1
    Not likely to be true.
  2. 2
    Not likely to happen.

Recorded use

Wiktionary examples

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

  1. It's highly improbable that aliens abducted you.
  2. Improbabile, that cannot be prooued, improbable.

Etymology

Borrowed from Latin improbābilis. By surface analysis, im- + probable.

Antonyms

probable

This word in other languages

improbable(Español)invraisemblable(Français)unwahrscheinlich(Deutsch)improvável(Português)

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.

immprobable1imporbable2impprobable1imprboable2improabble2improbabble1improbabel2improbablle1
Edit distance from "improbable"

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"?
"improbable" is spelled I-M-P-R-O-B-A-B-L-E. The IPA pronunciation is /ɪmˈpɹɑbəbl̩/.
What does "improbable" mean?
As an adjective, "improbable" means: Not likely to be true.
What are common misspellings of "improbable"?
Common misspellings include "immprobable", "imporbable", "impprobable", "imprboable", "improabble". The correct spelling is "improbable".
How do you pronounce "improbable"?
The IPA (International Phonetic Alphabet) transcription for "improbable" is /ɪmˈpɹɑbəbl̩/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "improbable"?
Borrowed from Latin improbābilis. By surface analysis, im- + probable. See the full etymology section above for more details.
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 English words by spelling shape

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

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

ineligible#19,868justifying#19,875generously#19,846modulation#19,908

Similar misspelling depth

Headwords with a similar count of attested misspellings (16 here; floor ≥5).

dishwasher16 variantsretrospect16 variantsunspecified16 variantstightening16 variants

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

Source: FrequencyWords open word-frequency list