insoluble
/ɪnˈsɑljəbəl/adjective, noun
insoluble is spelled I-N-S-O-L-U-B-L-E: 9 letters and 4 syllables. It appears about once in every 1 million words in written English, the 35,748th most frequent word form (wordfreq, 2021 data). As an adjective, insoluble means “That cannot be dissolved” (English Wiktionary, September 2026).
How many letters and syllables are in insoluble?
| Letters | 9: I-N-S-O-L-U-B-L-E |
|---|---|
| Syllables | 4 (from its American pronunciation) |
| In writing | about once in every 1 million words; the 35,748th most frequent word form |
| Wrong spellings searched | none measured in search |
| Rhymes with |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); rhymes and same-letter words are computed by PlainSpell from its own word list.
How common is insoluble?
Insoluble appears about once in every 1 million words in written English, the 35,748th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce insoluble?
- UK /ɪnˈsɒljʊbəl/
- US /ɪnˈsɑljəbəl/
Insoluble has 4 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vininn126-insoluble.wav, Wikimedia Commons (author and licence on each file's page).
What rhymes with insoluble?
2 words on PlainSpell end in the same sounds as insoluble from its last stressed vowel (/ɑljəbəl/):
Computed by PlainSpell from the pronunciations in the English Wiktionary (dump of September 2, 2026): a rhyme shares every sound from the last stressed vowel to the end; ordered by written frequency (wordfreq 3.1).
Forms of insoluble
- more insoluble comparative
- most insoluble superlative
- insolubles plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does insoluble mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
That cannot be dissolved.
Petroleum is largely insoluble in water.
- 2
That cannot be solved.
- 3
That cannot be explained.
Near-synonyms: unexplained, mysterious; see also Thesaurus:incomprehensible, Thesaurus:mysterious
- 4
That cannot be broken down or dispersed.
noun
- 1
Any substance that cannot be dissolved.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you abbreviate insoluble?
Wiktionary records one abbreviation of insoluble: insol.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Insoluble in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| German | unlösbar , unerklärlich |
| Portuguese | insolúvel |
| Spanish | insoluble |
| French | insoluble |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does insoluble come from?
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.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).