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boil sth down

phrasal verb with boil
 
 
/bɔɪl/ verb

Definition

to reduce information, usually so that it contains only its most important parts: He had boiled down a lengthy report to just a few paragraphs.Becoming and making smaller or lessBecoming and making less strong
(Definition of boil sth down from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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