To indoctrinate someone is to train them to accept one set of beliefs — often political or religious — as the only truth, and not to look at other ideas. It is not a warm word for teach. A teacher hopes you will think; a person who indoctrinates hopes you will stop asking. Newspapers and critics use it when they think a school, a party, an army, or a church is pushing a line too hard. The person being trained may not notice it is happening, which is part of why the word feels dark. You can indoctrinate children, new members, or a whole public, but the speaker almost always disapproves.

灌輸（思想、信念）；口語也說「洗腦」