He lost confidence and backed out of the deal at the last minute.

他失去了信心，在最后一刻退出了协议。

《牛津词典》

Now, while God was looking down on you to hear your prayers, you lost confidence and went away from Him.

现在，当上帝垂看你们，听你们的祷告的时候，你们却失了信心，离他而去了。

youdao

They all suffered a lot in body and spirit, but never lost confidence.

他们都在身体和精神上遭受了很多痛苦，但从未失去信心。

youdao

The American public had lost confidence in the direction elected leaders were taking America.

FORBES: The Day the Recovery Started

Many Americans have lost confidence in the way our criminal courts assess guilt and innocence.

WSJ: James Q. Wilson: Excerpts from His Writings in The Wall Street Journal

Over time, however, I have lost confidence that Facebook culturally is up to the task.

FORBES: One Business's Love-Hate Relationship With Facebook