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English definition of “bubble”

bubble

noun [C]  /ˈbʌb·əl/ us  
a ball of air in a liquid or on its surface, or in the air: When water begins to boil, small bubbles form around the edge of the pot.

bubble

verb [I]  /ˈbʌb·əl/ us  
to produce bubbles: The water in the pot began to bubble. fig. We were bubbling with excitement as we watched the Olympic flame being lit.
Phrasal verbs
(Definition of bubble from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of bubble?
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