adamantine

/ˌædəˈmæntaɪn/

//ˌædəˈmæntaɪn// adj

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

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

The verdict

“adamantine” is uncommon English (frequency #94,486 among 3,931 “A” headwords), classed as an adjective. The kind of spelling people second-guess.

#94,486
frequency rank, English
3,931
“A” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Synonym of adamant.

Corpus desk

Index EN-adamantine · adamantine · English

adamantine · rank #94,486 · 0 variants · 0 confusables

  • FREQ-RARE #94,486
  • LEN-MEGA 10 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH absurdum

Nearest frequency peer: absurdum (-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.

Long-tail ranks near “adamantine”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “adamantine” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for adamantine
PropertyValue
Headwordadamantine
LanguageEnglish
Part of speechAdjective
IPA/ˌædəˈmæntaɪn/
Letters10
Frequency rank#94,486
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “adamantine” in English

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).adamantinefalls in this rarity band:

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

Scale is logarithmic (each tick is 10× rarer). Rare peers in the same band: “absurdum” (#94,485), “Abbs” (#94,483), “Agostini” (#94,497). Among 3,931 “A” headwords, “adamantine” is #94,486. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

adamantine is uncommon English at frequency #94,486 among 3,931 “A” headwords, classed as anadjective, transcribed /ˌædəˈmæntaɪn/. Rarity is why readers land here mid-draft. 6 senses are on record.

We couldn't generate a plausible misspelling set for adamantine, suggesting the orthography follows predictable English patterns. 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 adamantine, adamantyne, adamauntyn (“(adjective) of adamant; (noun) adamant”), from Anglo-Norman adamantin and Middle French adamantin (“of or resembling adamant or diamond”) (modern French adamantin), and from its etymon Latin adamantin… The correct English form is adamantine, spelled A-D-A-M-A-N-T-I-N-E.

Definition

  1. 1
    Synonym of adamant.
  2. 2
    Synonym of adamant.
  3. 3
    Synonym of adamant.
  4. 4
    Synonym of adamant.
  5. 5
    Synonym of adamant.
  6. 6
    Like diamond in lustre; bright, lustrous, shiny; also, of a lustre: like that of a mineral with a high refractive index such as diamond.

Recorded use

Wiktionary examples

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

  1. [A]t laſt appeer / Hell bounds high reaching to the horrid Roof, / And thrice threefold the Gates; three folds vvere Braſs, / Three iron, three of Adamantine Rock, / Impenitrable, impal'd vvith circling fire, / Yet unconsum'd.
  2. adamantine bonds adamantine chains

Etymology

From Middle English adamantine, adamantyne, adamauntyn (“(adjective) of adamant; (noun) adamant”), from Anglo-Norman adamantin and Middle French adamantin (“of or resembling adamant or diamond”) (modern French adamantin), and from its etymon Latin adamantinus (“adamantine”), from Ancient Greek ἀδᾰμάντῐνος (adămántĭnos, “hard as adamant; made of steel”), from ᾰ̓δᾰμᾰντ- (ădămănt-) (a stem of ἀδάμᾱς (adámās, “the hardest metal (probably steel); diamond”), possibly originally Semitic) + -ῐνος (-ĭnos, suffix meaning ‘made of’ forming adjectives). By surface analysis, adamant + -ine (suffix meaning ‘of or pertaining to’ forming adjectives). Etymology 1 sense 1.2.4 (“having the quality of attracting or drawing”) and etymology 1 sense 2 (“like diamond in lustre; etc.”) refer to adamant (“(archaic) lodestone; (historical, poetic) diamond”).

This word in other languages

adamantino(Español)adamantin(Français)

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 "adamantine"?
"adamantine" is spelled A-D-A-M-A-N-T-I-N-E. The IPA pronunciation is /ˌædəˈmæntaɪn/.
What does "adamantine" mean?
As an adjective, "adamantine" means: Synonym of adamant.
How do you pronounce "adamantine"?
The IPA (International Phonetic Alphabet) transcription for "adamantine" is /ˌædəˈmæntaɪn/. 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 "adamantine"?
From Middle English adamantine, adamantyne, adamauntyn (“(adjective) of adamant; (noun) adamant”), from Anglo-Norman adamantin and Middle French adamantin (“of or resembling adamant or diamond”) (modern French adamantin), and from its etymon Latin... 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 "adamantine", not the corpus desk frequency band.

Same letter count

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

analogical#94,515unrewarded#94,391unfastened#94,385turnbuckle#94,369

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

Source: FrequencyWords open word-frequency list