bubble

Flow in an irregular current with a bubbling noise.

Expel gas from the stomach.

Cause to form bubbles.

“bubble gas through a liquid”

Form, produce, or emit bubbles.

Rise in bubbles or as if in bubbles.

“bubble to the surface”

A speculative scheme that depends on unstable factors that the planner cannot control.

“a real estate bubble”

A dome-shaped covering made of transparent glass or plastic.

A hollow globule of gas (e.g., air or carbon dioxide).

An impracticable and illusory idea.

“he didn't want to burst the newcomer's bubble”