imperceptibly
"imperceptibly" is a 13-letter English headword indexed on PlainSpell.
The verdict
“imperceptibly” is uncommon English (frequency #71,585 among 2,140 “I” headwords), classed as an adverb. The kind of spelling people second-guess.
- #71,585
- frequency rank, English
- 2,140
- “I” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Not noticeably; such that it cannot be detected, through being too small or too fast, etc.
Corpus desk
Index EN-imperceptibly · imperceptibly · English
imperceptibly · rank #71,585 · 0 variants · 0 confusables
- FREQ-RARE #71,585
- LEN-MEGA 13 letters
- VOW-5 5 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 2,140
- PHOTO-FINISH impoverishment
Nearest frequency peer: impoverishment (+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 “imperceptibly”
Sparse band: bars invert rank so rarer forms read shorter
- ignoble
ignoble
28,419 corpus weight
- Illingworth
Illingworth
28,418 corpus weight
- imperceptib…
imperceptibly
28,416 corpus weight
- impoverishm…
impoverishment
28,415 corpus weight
- indeciphera…
indecipherable
28,414 corpus weight
- ingratiate
ingratiate
28,412 corpus weight
What this shows Long-tail view: where “imperceptibly” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | imperceptibly |
| Language | English |
| Part of speech | Adverb |
| Letters | 13 |
| Frequency rank | #71,585 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “imperceptibly” in English
Rare enough to double-check
imperceptibly is uncommon English at frequency #71,585 among 2,140 “I” headwords, classed as anadverb. Rarity is why readers land here mid-draft. Gloss: "Not noticeably; such that it cannot be detected, through being too small or too fast, etc.".
No misspelling variants are generated for imperceptibly in our index, since its letter pattern doesn't lend itself to common typo substitutions. This entry stands alone in our confusable dataset, a sign it's visually distinctive enough not to be mixed up with another word.
Etymologically, the entry records: From imperceptible + -ly. The correct English form is imperceptibly, spelled I-M-P-E-R-C-E-P-T-I-B-L-Y.
Definition
- 1Not noticeably; such that it cannot be detected, through being too small or too fast, etc.
Recorded use
Wiktionary examplesThese source excerpts show how imperceptibly appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
No one noticed that he had moved imperceptibly backwards.
It often happens that the most important results in the natural world are brought about by causes which operate silently, if not imperceptibly.
Etymology
From imperceptible + -ly.
This word in other languages
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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Similar English words by spelling shape
Same letter count and similar misspelling depth for "imperceptibly", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 13 letters (nearest by frequency rank).