A person who dissuades someone; someone who persuades another to change their mind or abandon a plan.
From dissuade + -er (agent noun suffix). This formation turns the verb into a person who performs the action—similar to how 'teach' becomes 'teacher.'
A good dissuader doesn't just say 'no'—research on behavioral change shows the best dissuaders ask questions and help people discover problems with their plan themselves.
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