Definition

1. Verb:
   • To produce or become filled with small, spherical pockets of gas, typically air or vapor, surrounded by a liquid film. This process often results in a frothy or foamy appearance on the surface of a liquid.

Usage

• This verb describes the action of a liquid beginning to generate bubbles or the state of a liquid that is actively bubbling.
• It is often used to describe liquids that are boiling, fermenting, or being agitated (e.g., by stirring, shaking, or flowing rapidly over rocks).
• It can be used both transitively (with an object) and intransitively (without an object), though the intransitive use is more common.

Examples

• The soda began to form bubbles as soon as I poured it into the glass.
• When you add the vinegar to the baking soda, the mixture will instantly form bubbles.
• The waterfall caused the water below to churn and form bubbles.
• As the soup reached a rolling boil, it started to form bubbles vigorously.

Advanced Usage

• Scientific/Technical Context: Used to describe processes in chemistry (e.g., a gas-forming reaction), biology (e.g., fermentation), or physics (e.g., nucleation sites in a boiling liquid).
  • The chemical reaction caused the solution to form bubbles of hydrogen gas.
• Descriptive/Figurative Context: Can be used metaphorically to describe a feeling of excitement or effervescence.
  • Excitement formed bubbles in her chest as she waited for the news.

Variants and Related Words

• Bubble (verb): To form, produce, or rise as bubbles.
  • The champagne bubbled in the flute.
• Froth (verb): To produce or gather a mass of small bubbles; often implies a lighter, foamier consistency.
  • The barista frothed the milk for the cappuccino.
• Foam (verb): To produce or form a mass of small bubbles; similar to froth, sometimes implying more stability or volume.
  • The angry dog foamed at the mouth.
• Effervesce (verb): To give off bubbles of gas; to show liveliness or exhilaration.
  • The antacid tablet effervesced in the water.

Synonyms

• Fizz
• Effervesce
• Froth
• Foam
• Aerate (in the sense of causing bubbles to form)

Related Phrasal Verbs/Idioms

• Bubble over: To overflow with bubbles or, figuratively, with an emotion.
  • The pot is bubbling over!
  • She was bubbling over with joy.
• Bubble up: To rise to the surface as bubbles; to emerge.
  • Questions began to bubble up during the lecture.

Verb

1. become bubbly or frothy or foaming
   • The boiling soup was frothing
   • The river was foaming
   • Sparkling water