unimaginably

adv

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

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

The verdict

“unimaginably” is uncommon English (frequency #64,093 among 1,433 “U” headwords), classed as an adverb. The kind of spelling people second-guess.

#64,093
frequency rank, English
1,433
“U” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - To an extent or in a way that cannot be, or could not have been, imagined

Corpus desk

Index EN-unimaginably · unimaginably · English

unimaginably · rank #64,093 · 0 variants · 0 confusables

  • FREQ-RARE #64,093
  • LEN-MEGA 12 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 1,433
  • PHOTO-FINISH undefended

Nearest frequency peer: undefended (-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 “unimaginably”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for unimaginably
PropertyValue
Headwordunimaginably
LanguageEnglish
Part of speechAdverb
Letters12
Frequency rank#64,093
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “unimaginably” 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).unimaginablyfalls in this rarity band:

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

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “undefended” (#64,092), “unbeliever” (#64,090), “unpleasantly” (#64,096). Among 1,433 “U” headwords, “unimaginably” is #64,093. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

unimaginably is uncommon English at frequency #64,093 among 1,433 “U” headwords, classed as anadverb. Rarity is why readers land here mid-draft. Gloss: "To an extent or in a way that cannot be, or could not have been, imagined".

unimaginably doesn't appear in our generated misspelling index, since its letter pattern doesn't lend itself to common typo substitutions. It is not paired with a close-neighbour confusable in our dataset, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: From unimaginable + -ly. The correct English form is unimaginably, spelled U-N-I-M-A-G-I-N-A-B-L-Y.

Definition

  1. 1
    To an extent or in a way that cannot be, or could not have been, imagined

Recorded use

Wiktionary example

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

  1. As it prepares to inaugurate a new president, America is also trying to forge a fresh identity in a world unimaginably different from the one inherited by George W Bush only eight years ago.

Etymology

From unimaginable + -ly.

This word in other languages

inimaginablement(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 "unimaginably"?
"unimaginably" is spelled U-N-I-M-A-G-I-N-A-B-L-Y.
What does "unimaginably" mean?
As an adverb, "unimaginably" means: To an extent or in a way that cannot be, or could not have been, imagined
What is the origin of the word "unimaginably"?
From unimaginable + -ly. 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 "unimaginably", not the corpus desk frequency band.

Same letter count

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

unpleasantly#64,096volunteerism#64,110theosophical#64,060Winterbottom#64,130

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

Source: FrequencyWords open word-frequency list