博打で

through gambling

→ 博打
phrase Rare #43,852
through gambling で marks gambling as the means or context; depending on the sentence, it can also mean “at gambling.”
JA: 彼は博打で大金を失った。
EN: He lost a lot of money through gambling.

トムは博打で身を滅ぼした。

Tom ruined himself through gambling.

博打で彼は失敗した。

He failed at gambling.

彼は博打で身を滅ぼした。

He ruined himself through gambling.

博打で幸運、恋愛で不運。

Lucky at gambling, unlucky in love.