vouch 
/ˈvaʊtʃ/ verb
vouch·es; vouched; vouch·ing /ˈvaʊtʃ/ verb Meaning:
vouch for [phrasal verb]
vouch for (someone or something) : to say that (someone or something) is honest, true, or good
▪ I can vouch for the authenticity of the document. ▪ We'll vouch for him. He's a good guy.
▪ I can vouch for the authenticity of the document. ▪ We'll vouch for him. He's a good guy.
