IPA: /ˈbreɪnˌwɔʃɪŋ/
KK: /ˈbrenˌwɔʃɪŋ/
The process of using intense persuasion to change someone's beliefs or thoughts, often through repeated messages or indoctrination.
The cult was known for its brainwashing techniques that altered the members' views on reality.
Brainwashing → It is formed from "brain" (from Old English "brægen", meaning the organ of thought) and "washing" (from Old English "wascan", meaning to cleanse). The term describes the process of cleansing or altering one's thoughts or beliefs, particularly through coercive means.
Think of 'cleansing' ('washing') the 'thoughts' ('brain') — that's why brainwashing means altering someone's beliefs.