crucible
/ˈkɹuː.sɪ.bəl/
"crucible" is a 8-letter English headword indexed on PlainSpell.
The verdict
“crucible” is a moderately-common English word, ranked #21,481 in English word frequency and used as a noun.
- #21,481
- frequency rank, English
- 8
- letters
- 13
- tracked misspellings
- 4
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A cup-shaped piece of laboratory equipment used to contain chemical compounds when heating them to very high temperatures.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | crucible |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈkɹuː.sɪ.bəl/ |
| Letters | 8 |
| Frequency rank | #21,481 |
| Misspellings tracked | 13 |
| Confusable pairs | 4 |
| Source | Wiktionary (kaikki.org) |
Where “crucible” sits in English frequency
Spelling & Dictionary Insight
The English entry for crucible is 8 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈkɹuː.sɪ.bəl/. Corpus data places it at rank #21,481 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 13 likely wrong-spelling variants for crucible, with forms such as "ccrucible", "crcuible", and "crrucible". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 4 confusable-pair relationships, "crumble", "crucial", "credible", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From Latin crucibulum (“night-lamp, metallurgic melting-pot”), apparently a derivative of crux (“cross”), perhaps by analogy to thūribulum (“censer”) and suffix -bulum, or from crucio (“to torment”). The correct English form is crucible, spelled C-R-U-C-I-B-L-E.
Definition
- 1A cup-shaped piece of laboratory equipment used to contain chemical compounds when heating them to very high temperatures.
- 2A heat-resistant container in which metals are melted, usually at temperatures above 500°C, commonly made of graphite with clay as a binder.
- 3The bottom and hottest part of a blast furnace; the hearth.
- 4A very difficult and trying experience, that acts as a refining or hardening process.
Etymology
From Latin crucibulum (“night-lamp, metallurgic melting-pot”), apparently a derivative of crux (“cross”), perhaps by analogy to thūribulum (“censer”) and suffix -bulum, or from crucio (“to torment”).
This word in other languages
Common misspellings
Also misspelled as: ccrucible,crcuible,crrucible,crucable,crucbile,cruccible,crucibble,crucibel,cruciblle,crucilbe,cruicble,curcible,rcucible
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of crucible - 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
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Using “crucible”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is C-R-U-C-I-B-L-E - every other letter order is a misspelling in standard orthography.
- Say it as /ˈkɹuː.sɪ.bəl/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “crumble” - see the side-by-side comparison. crucible vs crumble
- 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.