商売で

in business

→ 商売
phrase Rare #28,043
in business 商売 means “business” or “commerce,” and で marks the context or means by which something happens. Depending on context, it can also mean “through business.”
JA: 彼女は商売で成功した。
EN: She succeeded in business.

商売でカイロよく来ていたからね

Because I used to come to Cairo quite often on business.

— イングリッシュ・ペイシェント (1996)

彼には商売で成功できるだけ押し強さがない

He doesn't have the assertiveness needed to succeed in business.

彼は商売で成功できなかった

He couldn't succeed in business.

商売でそんな失敗をしたらどんな会社で没落する

Any company would go under if it made such a mistake in business.

彼はその商売でお金をもうけた

He made money from that business.

資金彼が商売でを立てるのに十分だった

The funds were enough for him to establish himself in business.

彼は商売で成功するだけの押し強さがない

He isn't assertive enough to succeed in business.