Cajole

To persuade someone through flattery or gentle coaxing; to wheedle or coax someone into doing something through persistent, often insincere, charm.

From French 'cajoler,' possibly derived from 'cage' (referring to chattering like a bird in a cage) or from Norman dialect meaning 'to chatter like a jay.' The word entered English in the 17th century with its current meaning of coaxing through sweet talk.