brainwash

An "brainwash" is when someone tries to change your thoughts or opinions by using manipulative or persuasive methods. This can happen through controlling what information you see or hear.

Brainwash is often used to talk about situations where people are trying to convince others of a particular idea, especially one that's not entirely truthful. Think of politics and elections – sometimes politicians will use "brainwashing" tactics to make their message sound more appealing than it really is. Or imagine if someone you trust tells you what they want you to think instead of sharing the whole story. In both cases, brainwash is used to describe when people are being persuaded in a way that might not be entirely honest or fair.