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1950, a literal translation of Chinese xi nao. A term from the Korean War.
brainwashing brain·wash·ing (brān'wŏsh'ĭng)
Inducing a person to modify his or her beliefs, attitudes, or behavior by conditioning through various forms of pressure or torture.
Indoctrination that forces people to abandon their beliefs in favor of another set of beliefs. Usually associated with military and political interrogation and religious conversion, brainwashing attempts, through prolonged stress, to break down an individual's physical and mental defenses. Brainwashing techniques range from vocal persuasion and threats to punishment, physical deprivation, mind-altering drugs, and severe physical torture.
: Your line is persuasive, virtually a brainwashverb
[1950s+; fr Chinese hsi nao, ''wash brain,'' which came into US use during and after the Korean War, apparently because of its use by North Koreans and their Chinese allies as custodians of US prisoners of war]