Longman Dictionary of Contemporary English homepage

brainwash

 verb
     
brain‧wash [transitive]
to make someone believe something that is not true, by using force, confusing them, or continuously repeating it over a long period of time:
Young people are being brainwashed by this religious group.
brainwash somebody into doing something
Commercials brainwash consumers into buying things they don't need.
—brainwashing noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
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