To boil down or reduce a liquid (e.g., soup, stock, sauce) to concentrate flavor/consistency.
スープを弱火で煮詰めて、味を濃くした。
I reduced the soup over low heat to intensify the flavor.
このソースは時間をかけて煮詰めるとコクが出る。
This sauce gains richness if you take time to reduce it.
みそを煮詰めすぎると塩辛くなるから注意して。
Be careful not to over-reduce the miso, or it will become too salty.
To finalize or refine a discussion/plan; to work through details so a conclusion or finalized proposal is reached.
会議で議題を煮詰め、次回までに結論を出すことになった。
We refined the agenda in the meeting and decided to reach a conclusion by next time.
企画書を何度も煮詰めて、投資家に提出した。
We repeatedly refined the proposal and then submitted it to the investors.
契約条件を煮詰める必要がある。
We need to iron out the contract terms.