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to peter out

to peter out

9 5.6
To slowly become weaker and then stop
  • phrasal verb
  • /ˈpiːtər aʊt/
translation icon : desvanecerse
  • The enthusiasm for the project began to peter out after several weeks of no progress.

When that flow starts to like Peter out, I don't try to force it.

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Examples

  • The dust storm in the southern hemisphere had petered out at last, according to the previous night's weather report.

    Fiction book (1999)
  • I'm going to hope this thing peters out and we all look foolish for being so scared.

    Blog text (26)
  • I kind of start off slow, and then I slowly peter out.

  • After the newspaper got the phone number right, the calls started to peter out.

    Fiction book (1999)
  • If it's lacking in any way, you know that the electricity is going to peter out.

    Academic text (2009)
  • After a while she just sort of petered out, you know.

  • Most other efforts to check the courts in any meaningful way peter out early on in the legislative process.

    Academic text (1990)
  • The last cave paintings seem to have petered out about 150 years ago, around when Europeans arrived.

    Blog text (24)
  • Behind the walls of the Pentagon, the extraterrestrial debate at the top levels of Air Force intelligence petered out.

  • THE RIOTS THAT ERUPTED in London on August 6 finally petered out after four days.

    Academic text (2011)

Synonyms

to disappear
vsto peter out
1.0

To stop being seen or to no longer be there

focuses on the prior gradual weakening that leads to that stopping
to fade
vsto peter out
531 1.2

To slowly become less visible, bright, or loud

is similar but stresses final ending after gradual weakening
to go away
vsto peter out
463 1.0

To stop being seen or felt

adds the idea of a gradual weakening process before it ends
to decline
vsto peter out
344 3.7

To become less over time, for example in value or health

places more weight on finishing by disappearing rather than general worsening
to dwindle
vsto peter out
72 5.1

To become smaller or less in number over time

adds the clear idea of completing the process and disappearing
to fade away
vsto peter out
69 3.0

To become weaker and then disappear over time

focuses on gradual weakening that ends in disappearance in general situations
to blow over
vsto peter out
52 3.6

To become less serious or be forgotten over time

is about weakening then ending generally, not only disputes or issues
to fall off
vsto peter out
49 2.6

Become less in number, amount, or quality

conveys the same loss but stresses the process ending in disappearance
to die out
vsto peter out
47 3.7

To stop existing over time, for example animals or traditions

is similar but used for wider, nonliving situations too
to die down
vsto peter out
46 2.7

To become less strong or loud over time

is broader, covering weakening then ending in many contexts
to recede
vsto peter out
29 4.8

To move back or become less strong

is like this but more informal and focused on final disappearance
to fizzle
vsto peter out
  • Informal
27 5.6

To end in a weak or disappointing way after a promising start

is broader, covering gradual ending without the sense of failure
to die off
vsto peter out
21 5.8

Plants or animals gradually become fewer until none remain

is general, covering many things weakening and then stopping, not just groups
to drop off
vsto peter out
21 3.5

To become less in number or amount

adds the idea that the decrease continues until it ends completely
to fall away
vsto peter out
19 4.3

To become less in amount or quality

includes that steady drop but emphasises the final end as well
to fade out
vsto peter out
15 3.9

Gradually become harder to see or quieter until it disappears

covers the same ending but applies beyond sight or sound
to pass away
vsto peter out
12 3.5

To slowly disappear or stop existing

is the neutral everyday term for gradual weakening and ending
to taper off
vsto peter out
9 4.5

To become smaller or weaker over time until it stops

matches this closely but is more conversational and less precise
to die away
vsto peter out
8 4.2

To become quieter and then stop

is about any thing weakening then ending, not only sounds or feelings
to fizzle out
vsto peter out
  • Informal
8 5.3

To gradually lose energy or interest and end weakly

is more neutral, describing a plain gradual weakening and end
wane
vsto peter out
6 6.6

A slow decrease in size, strength, or number

describes the same decline but stresses final ending
to thin out
vsto peter out
4 3.5

Become fewer and more spread out

focuses on overall weakening then ending rather than just thinning
to drop away
vsto peter out
2 3.3

To become less over time

is broader, stressing the complete weakening and eventual end
to dwindle away
vsto peter out
1 4.6

Slowly get smaller in number or amount until nothing remains

is like this but used more in everyday language
to ebb away
vsto peter out
1 5.6

To move back slowly, like water leaving a shore

generalises that motion to any thing that weakens and ends
to dwindle down
vsto peter out
1 5.1

To become slowly smaller or less until almost nothing remains

is the everyday version that highlights final disappearance after decline
to ebb off
vsto peter out
6.5

To flow back or become less strong slowly

is similar but applies to many processes, not only flowing back
to evanesce
vsto peter out
  • Literature
9.9

To disappear slowly like mist

is a plain gradual weakening that ends, less literary in tone

Antonyms

1.0

To make something larger or more in number

327 3.0

To make muscles, relationships, or groups stronger

to persist
  • Formal
18 5.2

To stay in a place for a long time

How Gradual

to fade away
69 3.0
to taper off
9 4.5
to peter out
9 5.6
stop
310 1.0

Surface Forms

peter out infinitive
petered out past participle
petering out present participle
peters out third person singular

Morphology

peter + out

The core verb 'peter' has no transparent, productive meaning for most learners (it is historically a name-derived verb) so knowing 'peter' + 'out' does not allow a B1 learner to infer 'gradually diminish'. The particle 'out' only suggests an end or disappearance but does not supply the specific sense, making the expression idiomatic and unpredictable.

Etymology

The idiom peter out brings to mind a small flame or stream that slowly gets smaller until it stops. So, it means 'to gradually become weaker, smaller, or end'.