/vaʊʧ fɔː/ – verb
Definition: Đảm bảo, cam đoan.
A more thorough explanation: 1. to say that a someone has the qualities necessary for a particular task or position
2. to state that you believe something is correct or true; to say that you take responsibility for something
Example: 1. My client was then driven to his hotel where staff were able to vouch for him.
2. CBS has admitted that it cannot vouch for the authenticity of documents used to support the story.