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one fell swoop

one fell swoop

14 7.6
A single sudden action that happens all at once
  • idiom
: de una sola vez
  • She lost her job and her apartment in one fell swoop, leaving her feeling overwhelmed.

I got all the pants shopping done in one fell swoop.

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Examples

  • You can choose to install them in one fell swoop or one at a time.

    Blog text (11)
  • With the repeal of this act, the people are deprived, at one fell swoop, of any voice in their local affairs.

    Academic text (2017)
  • We'll round them all up with one fell swoop.

  • We have seen the whole thing fall down in one fell swoop.

    Blog text (13)
  • There was a way to solve all three problems in one fell swoop.

    Blog text (21)
  • I could take care of both those bucket list items in one fell swoop.

    Blog text (21)
  • So in one fell swoop, you address all these environmental issues just by stopping subsidizing animal agriculture.

  • In one fell swoop with emancipation, millions of former slaves were now citizens.

    Academic text (2017)
  • In one fell swoop, with one grand gesture, he has changed the course of American history and dramatically jeopardized the fate of the South that he loved so dearly.

  • Many of these strategies save money, help alleviate poverty, and create healthier environments—all in one fell swoop.

    Academic text (2005)

Synonyms

suddenly
vsone fell swoop
∞ 1.0

Quickly and without warning

is the same suddenness but stresses a single combined action
all of a sudden
vsone fell swoop
  • Informal
987 2.7

Very quickly and without warning

is a single sudden event rather than only unexpected speed
at once
vsone fell swoop
344 1.0

Immediately without delay

is a sudden single occurrence rather than simple immediacy
of a sudden
vsone fell swoop
  • Informal
116 7.1

Happens quickly and without warning

is focused on a single sudden act rather than general occurrence
in the blink of an eye
vsone fell swoop
  • Informal
50 3.3

Very quickly, in almost no time

is sudden similarly but implies one combined act rather than speed alone
in a flash
vsone fell swoop
  • Informal
35 2.5

Very quickly in a single moment

is sudden too but stresses one complete action or event
all at once
vsone fell swoop
13 3.0

Happening suddenly and without warning

is a single sudden action rather than mere unexpected timing
in one go
vsone fell swoop
4 3.4

All at once without stopping

is a single sudden event rather than just one attempt
in a snap
vsone fell swoop
  • Informal
3 3.0

It happens very quickly with little effort

is the sudden single action idea rather than just quick ease
in the wink of an eye
vsone fell swoop
  • Informal
1 3.5

Very quickly, in an instant

is a sudden single event rather than merely instant speed
at one stroke
vsone fell swoop
1 4.7

All done at the same time with one action

is a sudden single action rather than general quickness
in the snap of someone's fingers
vsone fell swoop
  • Informal
5.0

Happens very quickly

is sudden and singular rather than only effortless quickness

Antonyms

273 1.9

Slowly and steadily over time

Happens slowly, a little at a time

How Simultaneous

one fell swoop
14 7.6
all at once
13 3.0
together
∞ 1.0
one by one
186 1.4
one at a time
107 1.9

Surface Forms

Morphology

one + fell + swoop

While 'one' (single) combined with 'swoop' (a sudden movement or strike) can hint at a single sudden action, the key word 'fell' here is an archaic adjective meaning 'fierce' or 'deadly' and is unlikely to be known by a B1 learner (the input even shows it as not found). Because the idiomatic sense 'all at once' is partly inferable from 'one' + 'swoop' but depends on a rare/archaic modifier and a metaphorical extension, the expression is only partially transparent.

Etymology

One fell swoop comes from an old image of a fierce bird making a single sudden swoop, and fell once meant 'deadly'. So, the phrase now means 'all at once'.