Censorship

Latin censor — a Roman magistrate who assessed citizens' property and morals. The censor's role included supervising public conduct and could remove citizens from the rolls for moral failings. The English word entered use in the 16th century.

Contested almost entirely at the definitional level — what counts as censorship versus content moderation, editorial judgment, or deplatforming. Who has the power to censor matters enormously. Governments, corporations, and communities all do it differently and call it different things.