In a manner that opposes liberal principles or democracy; acting against individual freedoms or progressive values.
From antiliberal plus -ly (forming adverbs). This adverbial form emerged to describe how institutions or governments act when guided by anti-liberal principles.
When historians describe how a government 'antiliberally suppressed dissent,' they're using a technical term that evolved from political philosophy debates—the adverb form lets academic writing be both precise and concise.
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