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one fell swoop

one fell swoop

14 7.6
A single sudden action that happens all at once
  • idiom
translation icon : 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'.