insoluble

/ɪnˈsɒljʊbəl/

//ɪnˈsɒljʊbəl// adj

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

"insoluble" is a 9-letter English headword indexed on PlainSpell.

The verdict

“insoluble” has 13 generated spelling variants in the English index at frequency #35,782. The variants make it a useful spelling check.

#35,782
frequency rank, English
2,140
“I” headwords
13
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - That cannot be dissolved.

Corpus desk

Index EN-insoluble · insoluble · English

insoluble · rank #35,782 · 13 variants · 0 confusables

  • FREQ-MID #35,782
  • LEN-LONG 9 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-HIGH 13 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH innermost

Nearest frequency peer: innermost (-2 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.

Frequency neighbourhood for “insoluble”

Lower corpus rank = more everyday usage (inverted bar length for readability)

corpus weight

What this shows Bars show where “insoluble” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for insoluble
PropertyValue
Headwordinsoluble
LanguageEnglish
Part of speechAdjective
IPA/ɪnˈsɒljʊbəl/
Letters9
Frequency rank#35,782
Misspellings tracked13
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “insoluble” sits in English frequency

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).insolublelands here:

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

Scale is logarithmic (each tick is 10× rarer). Same rarity band neighbours include “innermost” (#35,780), “insulate” (#35,784), “interconnection” (#35,785). Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 13 spelling variants around insoluble (IPA /ɪnˈsɒljʊbəl/), anadjective. Corpus frequency is #35,782 among 2,140 “I” headwords. Wiktionary lists 4 senses, so context still picks the gloss.

Our generated misspelling index lists 13 likely wrong-spelling variants for insoluble, with forms such as "innsoluble", "inosluble", and "inslouble". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. Our confusable-pair dataset has no match for it, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From Middle English insolible, from Middle French insoluble, from Latin insolūbilis, from in- + solūbilis. Piecewise doublet of insolvable and unsolvable. By surface analysis, in- + soluble. The correct English form is insoluble, spelled I-N-S-O-L-U-B-L-E.

Definition

  1. 1
    That cannot be dissolved.
  2. 2
    That cannot be solved.
  3. 3
    That cannot be explained.
  4. 4
    That cannot be broken down or dispersed.

Recorded use

Wiktionary examples

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

  1. Petroleum is largely insoluble in water.
  2. The reason Fisher concluded that the problem is likely insoluble is that the ability of real-world agents to act on new perceived opportunities of arbitrage – including those that turn out to be incorrect – makes stability impossible to demonstrate without additional strong (and unrealistic) assumptions.

Etymology

From Middle English insolible, from Middle French insoluble, from Latin insolūbilis, from in- + solūbilis. Piecewise doublet of insolvable and unsolvable. By surface analysis, in- + soluble.

This word in other languages

insoluble(Español)insoluble(Français)unlösbar(Deutsch)

Common misspellings

Also misspelled as:

  • innsoluble
  • inosluble
  • inslouble
  • insolbule
  • insolluble
  • insolubble
  • insolubel
  • insolublle
  • insolulbe
  • insoulble
  • inssoluble
  • isnoluble
  • nisoluble

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of insoluble - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.

innsoluble1inosluble2inslouble2insolbule2insolluble1insolubble1insolubel2insolublle1
Edit distance from "insoluble"

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 "insoluble"?
"insoluble" is spelled I-N-S-O-L-U-B-L-E. The IPA pronunciation is /ɪnˈsɒljʊbəl/.
What does "insoluble" mean?
As an adjective, "insoluble" means: That cannot be dissolved.
What are common misspellings of "insoluble"?
Common misspellings include "innsoluble", "inosluble", "inslouble", "insolbule", "insolluble". The correct spelling is "insoluble".
How do you pronounce "insoluble"?
The IPA (International Phonetic Alphabet) transcription for "insoluble" is /ɪnˈsɒljʊbəl/. 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 "insoluble"?
From Middle English insolible, from Middle French insoluble, from Latin insolūbilis, from in- + solūbilis. Piecewise doublet of insolvable and unsolvable. By surface analysis, in- + soluble. 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 "insoluble", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 9 letters (nearest by frequency rank).

innermost#35,780hydrology#35,760margarine#35,821Mayflower#35,825

Similar misspelling depth

Headwords with a similar count of attested misspellings (13 here; floor ≥5).

knighted13 variantsexpedient13 variantsnormalcy13 variantseloquence13 variants

What to do next

You've looked up "insoluble". Here's where to go from here.

  • 13 edit-distance misspelling variants are generated for spell-check research on this headword. See variants
  • Usage frequency rank #35,782 among English headwords in this corpus. Corpus statistics
  • Browse more English words in the "I" letter cohort. I–Z browse
  • PlainSpell rotates a curated Word of the Day from the English corpus, a passive way to discover vocabulary. Word of the Day

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.

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

Source: FrequencyWords open word-frequency list