noun

1. a very thin film of liquid forming a ball around air or gas soap bubbles
2. a tiny ball of air or gas in a liquid or solid, as in carbonated water, glass, etc.
3. anything shaped like a bubble, sphere, or hemisphere, as a plastic or glass dome
4. 1. anything that is ephemeral or insubstantial
   2. any idea, scheme, etc. that seems plausible at first but quickly shows itself to be worthless or misleading
5. the act, process, or sound of bubbling

Etymology: ME bobel, of echoic orig., as in MDu bubbel

intransitive verb bubbled -·bled, bubbling -·bling

1. to make bubbles; rise in bubbles; boil; foam; effervesce
2. to make a boiling or gurgling sound

Etymology: ME bobelen

transitive verb

1. to form bubbles in; make bubble
2. ☆ Informal to cause (a baby) to burp