erupt

erupt — verb

1. A volcano that erupts sends hot liquid rock, ash, and gas bursting out of the ea

1.verbintransitiveB1
Definition

A volcano that erupts sends hot liquid rock, ash, and gas bursting out of the earth through an opening in its surface.

Example

Mount Merapi erupted without warning, sending ash and smoke high into the sky.

volcano erupts + adverb phrase for suddenness

Scientists warned that the volcano could erupt again at any moment.

Common collocations
  • erupt violently
  • erupt suddenly
  • volcano erupts
Synonyms
  • explode

    a single, contained burst; 'erupt' suggests ongoing or repeated ejection of material

  • spew

    focuses on material flowing out rather than the force of the burst

Antonyms
  • subside

    when volcanic activity calms down and stops

Grammar Patterns

volcano erupts

erupt + adverb (violently, suddenly)

Usage Note

The subject is always a volcano. This sense is the most frequent and historically the root meaning of the word, from which all other senses extend by metaphor.

Common Mistakes

The bomb erupted in the city center.
The bomb exploded in the city center.
'explode' is for bombs and devices; 'erupt' is for volcanoes and metaphorically for events.

2. When fighting, violence, a fire, or a dangerous event erupts, it begins suddenly

2.verbintransitiveB2
Definition

When fighting, violence, a fire, or a dangerous event erupts, it begins suddenly and spreads with great force.

Example

Fighting erupted between rival groups after the football match ended.

erupt + between + groups for conflict

A huge fire erupted in the old textile factory late at night.

Common collocations
  • fighting erupts
  • war erupts
  • violence erupts
  • fire erupts
Synonyms
  • break out

    less forceful; used for diseases and wars (war broke out)

  • flare up

    suggests something that was already simmering and suddenly becomes active again

Antonyms
  • subside

    gradually become less intense or stop

  • die down

    become quieter or less violent

Grammar Patterns

fighting/war/fire erupts

erupt between + groups

Usage Note

Subject is typically a conflict or disaster (fighting, war, fire, violence). The sense emphasises sudden, forceful beginning rather than the event's duration. Frequently pairs with prepositions 'between' (groups) or 'in/at' (locations).

Common Mistakes

A party erupted in the park.
A fight erupted in the park.
'erupt' in this sense requires a conflict or dangerous event, not a neutral or positive one.

3. To suddenly burst into loud laughter, shouting, or other strong emotions that ar

3.verbintransitiveB2
Definition

To suddenly burst into loud laughter, shouting, or other strong emotions that are difficult to hold back.

Example

The audience erupted into laughter at the comedian's very first joke.

erupt into laughter — common pattern for group reaction

Sirin erupted in anger when she discovered someone had read her private diary.

erupt in anger — singular person, strong emotion

Common collocations
  • erupt into laughter
  • erupt in anger
  • erupt with cheers
Synonyms
  • burst out

    usually for laughter or tears; slightly less intense than 'erupt'

  • explode

    more personal and uncontrolled; 'explode with anger' suggests a single outburst

Antonyms

Grammar Patterns

erupt into + noun (laughter, cheers, anger)

erupt in + noun

Usage Note

Commonly followed by 'into' or 'in' plus an emotion or reaction noun ('erupted into laughter', 'erupted in anger'). The subject can be a group (audience, crowd) or an individual, but group subjects are more frequent.

Common Mistakes

She erupted at the news.
She erupted in anger at the news.
the emotion or reaction must be stated after 'in' or 'into'.

4. When spots, a rash, or pimples erupt, they show up on the skin all at once and o

4.verbintransitiveB1
Definition

When spots, a rash, or pimples erupt, they show up on the skin all at once and often in large quantities.

Example

The night before her wedding, a red rash erupted all over Aylin's neck and face.

rash erupts all over + body part — sudden widespread outbreak

Teenagers often find that painful spots erupt on their faces during puberty.

Common collocations
  • rash erupts
  • spots erupt
  • erupt on the skin
  • erupt in a rash
Synonyms
  • break out

    commonly used with 'in' ('break out in a rash'); slightly less formal than 'erupt'

  • appear

    neutral, no sense of suddenness or quantity

Antonyms

Grammar Patterns

spots/rash erupt + on + body part

skin erupts in + spots/rash

Usage Note

The subject is the spots, rash, or bumps themselves. To describe a person breaking out, use 'erupt in' ('Her face erupted in red spots').

Common Mistakes

I erupted with spots.
Spots erupted on my face.
the spots are the grammatical subject, not the person.

5. A tooth that erupts breaks through the gum and emerges into the mouth as a visib

5.verbintransitiveB2
Definition

A tooth that erupts breaks through the gum and emerges into the mouth as a visible new tooth.

Example

The baby's first tooth erupted when she was only seven months old.

baby's tooth erupts — common milestone context

A dentist uses an X-ray to see if a wisdom tooth is about to erupt.

Common collocations
  • tooth erupts
  • erupt through the gum
  • wisdom tooth erupts
Synonyms
  • come through

    everyday alternative; less formal than 'erupt'

  • emerge

    slightly broader; can describe any body part becoming visible

Grammar Patterns

tooth erupts

erupt through the gum

Usage Note

This is a technical term common in medical and dental writing. In everyday conversation, speakers prefer 'come through' or 'come in' ('His wisdom teeth are coming through').

Word family

Synonym discussion

Sense: verb/1

All three words describe something forceful coming out, but they differ in how and what. 'Explode' suggests a single, contained blast that breaks something apart — a bomb explodes, a balloon explodes. 'Erupt' (sense 1) is specific to volcanoes and suggests ongoing or repeated ejection of material rather than one moment of destruction. 'Spew' focuses on the substance flowing out (often in large, messy quantities) rather than the force of the initial burst — you say 'the pipe spewed dirty water,' not 'the pipe erupted dirty water.' 'Burst forth' is more literary and implies sudden emergence with energy, often used for water or crowds. For a volcano, 'erupt' is the precise term; 'explode' would exaggerate the single-blast aspect, and 'spew' would downplay the force of the event.

explode ↗spewburst forth

Common collocations

Nouns

Adverbs

Phrases

  • erupt into
  • erupt in
  • erupt from

Prepositions

Etymology

LatinEnglish

From Latin 'ērumpō' — made from 'ē-' (out) and 'rumpō' (to break). The original image was something breaking out from confinement, like a prisoner bursting free. English borrowed it in the 1600s, first for volcanoes and later extended to wars, emotions, skin rashes, and teeth — all sharing the idea of something suddenly forcing its way out.