impermanent

adj

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

"impermanent" is a 11-letter English headword indexed on PlainSpell.

The verdict

“impermanent” is uncommon English (frequency #75,985 among 2,140 “I” headwords), classed as an adjective. The kind of spelling people second-guess.

#75,985
frequency rank, English
2,140
“I” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - not permanent; unperpetual.

Corpus desk

Index EN-impermanent · impermanent · English

impermanent · rank #75,985 · 0 variants · 0 confusables

  • FREQ-RARE #75,985
  • LEN-MEGA 11 letters
  • VOW-4 4 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 2,140
  • PHOTO-FINISH immunosuppres…

Nearest frequency peer: immunosuppression (-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 “impermanent”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

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

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for impermanent
PropertyValue
Headwordimpermanent
LanguageEnglish
Part of speechAdjective
Letters11
Frequency rank#75,985
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “impermanent” in English

This scale runs from the tiny cluster of words that carry ordinary speech (left) to the long tail of words almost nobody reaches for (right).impermanentfalls 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: “immunosuppression” (#75,984), “impulsiveness” (#75,986), “incommunicado” (#75,987). Among 2,140 “I” headwords, “impermanent” is #75,985. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

impermanent is uncommon English at frequency #75,985 among 2,140 “I” headwords, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "not permanent; unperpetual.".

Our edit-distance generator produced no likely misspellings for impermanent, since its letter sequence doesn't invite the usual edit-distance slips. This headword has no recorded confusable partner, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: From Middle French impermanent, from im- + permanent. The correct English form is impermanent, spelled I-M-P-E-R-M-A-N-E-N-T.

Definition

  1. 1
    not permanent; unperpetual.

Etymology

From Middle French impermanent, from im- + permanent.

This word in other languages

impermanent(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 "impermanent"?
"impermanent" is spelled I-M-P-E-R-M-A-N-E-N-T.
What does "impermanent" mean?
As an adjective, "impermanent" means: not permanent; unperpetual.
What is the origin of the word "impermanent"?
From Middle French impermanent, from im- + permanent. 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 "impermanent", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 11 letters (nearest by frequency rank).

innervation#75,993Letterkenny#76,059Lindisfarne#76,065magisterium#76,089

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

Source: FrequencyWords open word-frequency list