That there is a secret that would ruin our business, if it got out.

She was going to ruin his business if he wasn't careful.

"Doesn't the city know this will ruin my business?"

When she tells him this, he sets out to ruin Ram's business.

It's not going to ruin their business, after all.

"If you put out your shingle here, you'd ruin her business."

"He is simply ruining our business, and something must be done at once."

Would you care for something to drink while you're ruining my business?

But all this is ruining my business, and no one seems to want to help solve the problem.

"And what should I pay you, for having ruined my business?"