unpersuade
/ˌʌnpəˈsvɑɪd/ or /ʌnpəˈswɑɪd/Definitions
1. verb
to convince someone that a plan or suggestion is not a good idea
“The sales representative tried to unpersuade the customer from buying the expensive model.”
2. verb
to persuade someone to do or believe something is a bad idea
“The teacher tried to unpersuade the student from dropping the course.”
3. noun
the act of convincing someone that a plan or suggestion is not a good idea
“The unpersuading of the customer was a difficult task.”