unsolvable
"unsolvable" is a 10-letter English headword indexed on PlainSpell.
The verdict
“unsolvable” is uncommon English (frequency #65,600 among 1,433 “U” headwords), classed as an adjective. The kind of spelling people second-guess.
- #65,600
- frequency rank, English
- 1,433
- “U” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Not solvable.
Corpus desk
Index EN-unsolvable · unsolvable · English
unsolvable · rank #65,600 · 0 variants · 0 confusables
- FREQ-RARE #65,600
- LEN-MEGA 10 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 1,433
- PHOTO-FINISH unrecognised
Nearest frequency peer: unrecognised (-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.
Frequency neighbourhood for “unsolvable”
Lower corpus rank = more everyday usage (inverted bar length for readability)
- unlined
unlined
34,404 corpus weight
- unplugging
unplugging
34,403 corpus weight
- unrecognised
unrecognised
34,402 corpus weight
- unsolvable
unsolvable
34,401 corpus weight
- unspoilt
unspoilt
34,400 corpus weight
- unstressed
unstressed
34,399 corpus weight
What this shows Bars show where “unsolvable” sits against the nearest ranked English headwords in the FrequencyWords band, not a reprint of letter-browse containment.
| Property | Value |
|---|---|
| Headword | unsolvable |
| Language | English |
| Part of speech | Adjective |
| Letters | 10 |
| Frequency rank | #65,600 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “unsolvable” sits in English frequency
Rare enough to double-check
unsolvable is uncommon English at frequency #65,600 among 1,433 “U” headwords, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Not solvable.".
unsolvable doesn't appear in our generated misspelling index, a straightforward case of a spelling with little room for common typos. Our dataset records no confusable match here, since no other headword is close enough in sound or shape to pair with it.
Etymologically, the entry records: From un- + solvable. Piecewise doublet of insolvable and insoluble. The correct English form is unsolvable, spelled U-N-S-O-L-V-A-B-L-E.
Definition
- 1Not solvable.
Recorded use
Wiktionary exampleThese source excerpts show how unsolvable appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Throughout this section, we shall assume the existence of finitely presented groups with unsolvable word problem.
Etymology
From un- + solvable. Piecewise doublet of insolvable and insoluble.
This word in other languages
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
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "unsolvable", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 10 letters (nearest by frequency rank).
What to do next
You've looked up "unsolvable". Here's where to go from here.
- Usage frequency rank #65,600 among English headwords in this corpus. Corpus statistics
- Browse more English words in the "U" letter cohort. U–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.