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Definition

McCarthyism noun

/məˈkɑː.θi.ɪ.zəm/US pronunciation symbol/-ˈkɑːr-/ n [U]
the act of accusing someone of something that is considered unacceptable by many people, especially when you have no proof
McCarthyism is named after the American politician Joseph McCarthy, who in the 1950s accused many Americans of being Communists.
She was a victim of McCarthyism.

McCarthyite

noun adjective

/məˈkɑː.θi.aɪt/US pronunciation symbol/-ˈkɑːr-/ n [C] adj
(also

McCarthyist

)
He led a McCarthyite witch-hunt against homosexuals.

(Definition of McCarthyism noun from the Cambridge Advanced Learner's Dictionary)
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