The phrase 'break trust' is correct and can be used in written English.
You can use it when referring to a situation where someone has lost the confidence or trust of another person or group. For example: "The betrayal of his friends completely broke their trust."
"He is wholly unrepentant, and the parole board found his propensity to break trust a very significant factor.
We talked about integrity and the feeling in our bodies when we act in ways that break trust, that we know are wrong.
"The alleged arrangements make accountability impossible and promote corruption at the top levels of the Afghan government, as well as break trust with the American taxpayer," Mr. Corker wrote.
Mr. Miles also said such a sale "would break trust" with those who have contributed to the arts at the university over the years, "would chill any future donations, and may well lead to litigation with the family that donated 'Mural' to the University of Iowa in the first place".
Did he break trust with President Bush and the nation when he told syndicated columnist Robert D. Novak about Valerie Plame's classified job with the CIA? Did he further erode that trust in 2003 when he told then-White House press secretary Scott McClellan that, as McClellan put it, there was "no truth" to rumors that he played a role in the disclosure of Plame's identity?
It takes only one ethical breach, one lapse in judgment, to torpedo your credibility and break trust.
"You're breaking trust with your people," he said.
Bonds have been broken, trust abused and lost.
Yes, Tuilagi has broken the law, while Pietersen has 'only' broken trust.
The first minister said Labour had a history of breaking trust with its voters.
The disproportionality breaks trust between the police and vast majority of law abiding ethnic minority people".
