antediluvian

/ˌæn.tɪ.dɪˈluː.vɪ.ən/

//ˌæn.tɪ.dɪˈluː.vɪ.ən// adj

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

"antediluvian" is a 12-letter English headword indexed on PlainSpell.

The verdict

“antediluvian” is uncommon English (frequency #86,013 among 3,931 “A” headwords), classed as an adjective. The kind of spelling people second-guess.

#86,013
frequency rank, English
3,931
“A” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Belonging or pertaining to, or existing in, the time prior to the great flood described in Genesis, or (by extension) to a great or destructive flood or deluge described in other mythologies.

Corpus desk

Index EN-antediluvian · antediluvian · English

antediluvian · rank #86,013 · 0 variants · 0 confusables

  • FREQ-RARE #86,013
  • LEN-MEGA 12 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 3,931
  • PHOTO-FINISH aniseed

Nearest frequency peer: aniseed (-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.

Long-tail ranks near “antediluvian”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for antediluvian
PropertyValue
Headwordantediluvian
LanguageEnglish
Part of speechAdjective
IPA/ˌæn.tɪ.dɪˈluː.vɪ.ən/
Letters12
Frequency rank#86,013
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “antediluvian” in English

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).antediluvianfalls in this rarity band:

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

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Rare peers in the same band: “aniseed” (#86,011), “anticorruption” (#86,015), “antifascist” (#86,016). Among 3,931 “A” headwords, “antediluvian” is #86,013. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

antediluvian is uncommon English at frequency #86,013 among 3,931 “A” headwords, classed as anadjective, transcribed /ˌæn.tɪ.dɪˈluː.vɪ.ən/. Rarity is why readers land here mid-draft. 4 senses are on record.

Our edit-distance generator produced no likely misspellings for antediluvian, suggesting the orthography follows predictable English patterns. No confusable counterpart is on file for this word, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: PIE word *dwís From ante- (prefix meaning ‘prior to in time’) + Latin dīluvium (“a flood”) + -an (suffix meaning ‘of or pertaining to’ forming adjectives; and forming agent nouns), referring the story of Noah’s Ark, through which God rescues Noah, his fami… The correct English form is antediluvian, spelled A-N-T-E-D-I-L-U-V-I-A-N.

Definition

  1. 1
    Belonging or pertaining to, or existing in, the time prior to the great flood described in Genesis, or (by extension) to a great or destructive flood or deluge described in other mythologies.
  2. 2
    Of animals and plants: long extinct; prehistoric.
  3. 3
    Of a person or thing: very old; ancient.
  4. 4
    Of attitudes, ideas, etc.: extremely old-fashioned, especially to a laughable extent; antiquated.

Recorded use

Wiktionary examples

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

  1. [P]erhaps ſome perſons might outlive Methuſelah; the Text intending onely the maſculine line of Seth, conduceable unto the Genealogy of our Saviour, and the antediluvian Chronology.
  2. For Noah, vvho had no doubt preach'd againſt the Vices of the Antediluvian VVorld, and againſt Drunkenneſs among the reſt, muſt certainly knovv the Uſe of the Vine, and the Abuſe of it too; hovv elſe did he come to plant it at all, and to preſs the Juice out for Drinking it at all?

Etymology

PIE word *dwís From ante- (prefix meaning ‘prior to in time’) + Latin dīluvium (“a flood”) + -an (suffix meaning ‘of or pertaining to’ forming adjectives; and forming agent nouns), referring the story of Noah’s Ark, through which God rescues Noah, his family, and examples of all the world’s animals from the great flood, which is related in Genesis 6–9 of the Bible. Dīluvium is derived from dīluō (“to wash away”) (from dis- (prefix meaning ‘apart, asunder, in two’) + lavō (“to wash”) (ultimately from Proto-Indo-European *lewh₃- (“to wash”))) + -ium (suffix forming abstract nouns). The English word is analyzable as ante- + diluvian. Adjective sense 2 (“long extinct”) is from the fact that such animals and plants were originally believed to have perished in the biblical flood referred to above.

This word in other languages

antediluviano(Español)antédiluvien(Français)vorsintflutlich(Deutsch)antediluviano(Português)

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 "antediluvian"?
"antediluvian" is spelled A-N-T-E-D-I-L-U-V-I-A-N. The IPA pronunciation is /ˌæn.tɪ.dɪˈluː.vɪ.ən/.
What does "antediluvian" mean?
As an adjective, "antediluvian" means: Belonging or pertaining to, or existing in, the time prior to the great flood described in Genesis, or (by extension) to a great or destructive flood or deluge described in other mythologies.
How do you pronounce "antediluvian"?
The IPA (International Phonetic Alphabet) transcription for "antediluvian" is /ˌæn.tɪ.dɪˈluː.vɪ.ən/. 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 "antediluvian"?
PIE word *dwís From ante- (prefix meaning ‘prior to in time’) + Latin dīluvium (“a flood”) + -an (suffix meaning ‘of or pertaining to’ forming adjectives; and forming agent nouns), referring the story of Noah’s Ark, through which God rescues Noah... See the full etymology section above for more details.
Is PlainSpell free to use?
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Similar English words by spelling shape

Same letter count and similar misspelling depth for "antediluvian", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 12 letters (nearest by frequency rank).

beneficially#86,062wavefunction#85,933underinsured#85,888compellingly#86,159

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

Source: FrequencyWords open word-frequency list