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win someone over (to something)
to succeed in making someone favorable to something. I hope I can win them all over to our side. I won over the mayor to our side.
win somebody/something overalso win over somebody/something
to succeed in changing opinion The senator made a stirring speech but failed to win over enough votes to pass his bill. The argument she used to win them over was not about who was right and who was wrong.
Persuade, gain one's support, as in It won't be easy to win him over to our point of view. [Late 1800s]
To succeed in gaining the favor or support of someone; prevail on someone: The politician spent a long time trying to win over the undecided voters. At first they didn't want to join us for dinner, but we finally won them over.