impetus
/ˈɪm.pə.təs/
"impetus" is a 7-letter English headword indexed on PlainSpell.
The verdict
“impetus” is a moderately-common English word, ranked #20,388 in English word frequency and used as a noun.
- #20,388
- frequency rank, English
- 7
- letters
- 10
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Anything that impels; a stimulating factor.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | impetus |
| Language | English |
| Part of speech | Noun |
| IPA | /ˈɪm.pə.təs/ |
| Letters | 7 |
| Frequency rank | #20,388 |
| Misspellings tracked | 10 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “impetus” sits in English frequency
Spelling & Dictionary Insight
The English entry for impetus is 7 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈɪm.pə.təs/. Corpus data places it at rank #20,388 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 5 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 10 likely wrong-spelling variants for impetus, with forms such as "imeptus", "immpetus", and "impetsu". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 1 confusable-pair relationship, "impetuous", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: Borrowed from Latin impetus (“a rushing upon, an attack, assault, onset”), from impetō (“to rush upon, attack”), from in- (“upon”) + petō (“to seek, fall upon”). The correct English form is impetus, spelled I-M-P-E-T-U-S.
Definition
- 1Anything that impels; a stimulating factor.
- 2A force, either internal or external, that impels; an impulse.
- 3The force or energy associated with a moving body; a stimulus.
- 4A principle of motive force, held as equivalent to weight times velocity by John Buridan, in an auxiliary theory of Aristotelian dynamics introduced by John Philoponus, describing projectile motion against gravity as linear until it transitions to a vertical drop and the intellectual precursor to the concepts of inertia, momentum and acceleration in classical mechanics.
- 5An activity in response to a stimulus.
Etymology
Borrowed from Latin impetus (“a rushing upon, an attack, assault, onset”), from impetō (“to rush upon, attack”), from in- (“upon”) + petō (“to seek, fall upon”).
This word in other languages
Common misspellings
Also misspelled as: imeptus,immpetus,impetsu,impettus,impetuss,impeuts,imppetus,impteus,ipmetus,mipetus
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of impetus - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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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Using “impetus”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-M-P-E-T-U-S - every other letter order is a misspelling in standard orthography.
- Say it as /ˈɪm.pə.təs/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “impetuous” - see the side-by-side comparison. impetus vs impetuous
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.