This means 'precisely because' or 'all the more because'. You use it to show that a reason makes something much stronger or more important.
Verb [dictionary form] + だけにPrimary
い-Adjective + だけに
な-Adjective + な + だけに
Noun + だけに
Clause [plain past] + だけに
This means 'precisely because' or 'all the more because'. You use it to show that a reason makes something much stronger or more important.
期待が大きかっただけに、結果にはがっかりした。
Precisely because my expectations were high, I was disappointed with the result.
楽しみにしていた旅行だけに、中止になったときは本当にショックだった。
Precisely because it was a trip I had been looking forward to, I was truly shocked when it was cancelled.
彼女はきれいなだけに、わがままを言っても周りは許してしまう傾向がある。
Precisely because she is beautiful, people around her tend to forgive her even when she acts selfishly.
社長直々の命令だっただけに、そのプロジェクトの失敗は許されなかった。
Precisely because it was an order directly from the president, failure on that project was not an option.
普段あまり運動しないだけに、少し階段を上っただけで息が切れる。
Precisely because I don't usually exercise, I get out of breath just from climbing a few stairs.
This grammar makes the feeling or situation in the second part much stronger. The first part acts like a magnifying glass. It makes the result seem bigger or more important.
This is different from '〜だけあって' (dake atte). 'だけあって' means "as expected." It states a fact. 'だけに' shows a stronger feeling. It means "precisely because." The result feels more important or intense.
Use this when you want to show a strong feeling or outcome. It means 'because of this, it is even more so.' You are saying the reason makes the result very clear.
Contrasts with(1)
Less formal alternatives(2)
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