American English

Definition of boil up phrasal verb from the Oxford Advanced American Dictionary

 

boil up

 phrasal verb
phrasal verb
 
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Phrasal Verbs
if a situation or an emotion boils up, it becomes dangerous, worrying, etc. I could feel anger boiling up inside me.

boil somethingup

 
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to heat a liquid or some food until it boils She boiled up a large pan of water.
See the Oxford Advanced Learner's Dictionary entry: boil up