one fell swoop

noun

"one-fell-swoop" is a 12-letter English headword indexed on PlainSpell.

The verdict

“one fell swoop” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
14
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - One stroke; one action or event that achieves or accomplishes many results.

Corpus desk

Index EN-one-fell-swoop · one fell swoop · English

one fell swoop · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 14 letters
  • VOW-5 5 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "O" thin
  • PHOTO-UNK Peer pending

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.

Key facts for one fell swoop
PropertyValue
Headwordone fell swoop
LanguageEnglish
Part of speechNoun
Letters14
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “one fell swoop” in English

one fell swoopranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

one fell swoop is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "One stroke; one action or event that achieves or accomplishes many results.".

We couldn't generate a plausible misspelling set for one fell swoop, a sign its spelling follows regular English conventions. Our confusable-pair dataset has no match for it, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: After Shakespeare, in Macbeth, act iv, scene 3, where Macduff learns his wife and entire family are murdered: : Ro. Wife, Children, Servants, all that could be found. […] : Macd. […] All my pretty ones? Did you say All? Oh Hell-Kite! All? What, All my prett… The correct English form is one fell swoop, spelled O-N-E- -F-E-L-L- -S-W-O-O-P.

Definition

  1. 1
    One stroke; one action or event that achieves or accomplishes many results.

Recorded use

Wiktionary examples

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

  1. Changing the oil lubricates the engine and removes debris in one fell swoop.
  2. ...they might be hanging about there or simply marauders ready to decamp with whatever boodle they could in one fell swoop at a moment's notice, your money or your life, leaving you there to point a moral, gagged and garrotted.

Etymology

After Shakespeare, in Macbeth, act iv, scene 3, where Macduff learns his wife and entire family are murdered: : Ro. Wife, Children, Servants, all that could be found. […] : Macd. […] All my pretty ones? Did you say All? Oh Hell-Kite! All? What, All my pretty Chickens, and their Damme At one fell swoope? The imagery is of a bird of prey ("hell-kite") ransacking a whole nest at one blow, fell meaning "terrible, cruel, savage." In later uses of the expression, the force of the metaphor is reduced or lost.

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). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "one fell swoop"?
"one fell swoop" is spelled O-N-E- -F-E-L-L- -S-W-O-O-P.
What does "one fell swoop" mean?
As a noun, "one fell swoop" means: One stroke; one action or event that achieves or accomplishes many results.
What is the origin of the word "one fell swoop"?
After Shakespeare, in Macbeth, act iv, scene 3, where Macduff learns his wife and entire family are murdered: : Ro. Wife, Children, Servants, all that could be found. […] : Macd. […] All my pretty ones? Did you say All? Oh Hell-Kite! All? What, Al... 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.

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

Source: FrequencyWords open word-frequency list