cajoler
/kəˈdʒoʊlər/Definitions
1. verb
to flatter or try to win someone over by being excessively friendly or charming
“She tried to cajole her friend into lending her money by making promises she couldn’t keep.”
2. noun
a person who tries to win someone over by being excessively friendly or charming
“The cajoler convinced the investor to invest in his failing business.”