我告诉他不会再给他钱了，但随后我动摇了。

I told him he wasn't having any more money but then I ___weakened.

她的论据非常有说服力，开始动摇了我的决心。

Her arguments were so persuasive that they began to ___weaken my resolve.

持续的批评最终削弱了他对这个项目的信心。

The constant criticism eventually ___weakened his confidence in the project.