Definition

Verb (intransitive): 1. To gradually become smaller, weaker, or less active and then stop completely. This meaning describes something that diminishes slowly in intensity, quantity, or force until it ceases. 2. To come to an end weakly or inconclusively. This meaning emphasizes a lack of a strong, definitive, or proper ending.

Usage and Examples

The verb "peter out" is used to describe a process of gradual decline leading to cessation. It is intransitive and does not take a direct object.

• The heavy rain petered out into a light drizzle by the afternoon.
• Their initial enthusiasm for the project petered out after a few difficult months.
• The old mining town petered out as the resources were exhausted.
• The trail peters out near the top of the mountain, so hikers must be careful.
• The protest started loudly but petered out without any major changes.

Advanced Usage

• "to peter out to nothing": To diminish until there is absolutely nothing left.
  • The stream, which was once powerful, has now petered out to nothing in the summer heat.

Variants and Related Words

• Peter (verb, archaic): While not commonly used this way today, "peter" as a standalone verb historically meant "to become exhausted" or "to run out," which is the root of the phrasal verb "peter out."

Synonyms

• Diminish: To become or make less.
• Dwindle: To gradually become smaller or less.
• Fade (away): To disappear gradually.
• Taper off: To gradually reduce in amount or intensity.
• Run out: To be used up or exhausted.
• Die away: To become gradually quieter or weaker until inaudible or gone.

Antonyms

• Intensify: To become stronger or more extreme.
• Increase: To become greater in size, amount, or intensity.
• Persist: To continue firmly in a course of action despite difficulty.
• Surge: To increase suddenly and powerfully.

Related Phrasal Verbs

• Fizzle out: To end or fail in a weak, disappointing, or anticlimactic way. This is a very close synonym, often used for events or efforts that end poorly.
  • The party fizzled out long before midnight.
• Tail off: To gradually become quieter, smaller, or less frequent. Often used for speech, sound, or performance.
  • His voice tailed off as he lost confidence in his own story.

Related Idioms

• Run out of steam: To lose energy or enthusiasm and stop.
  • The team started the project well but ran out of steam halfway through.
• Come to a grinding halt: To stop slowly and completely, often with difficulty. This implies a more laborious stop than "peter out."
  • Without funding, the research came to a grinding halt.

Verb

1. use up all one's strength and energy and stop working
   • At the end of the march, I pooped out
2. end weakly
   • The music just petered out--there was no proper ending