boil down
US /bɔɪl daʊn/
UK /bɔɪl daʊn/
1.
to reduce a liquid by boiling so that it becomes thicker and more concentrated
:
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You need to boil down the sauce until it thickens.
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The chef decided to boil down the stock for a richer flavor.
2.
to summarize or simplify something to its most essential points
:
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The whole argument can boil down to a single question.
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Ultimately, the problem boiled down to a lack of communication.