In a derogative manner; with detracting, disparaging, or insulting intent or effect.
From 'derogative' + '-ly' adverbial suffix, creating an adverb that describes how something is said or done in a detracting manner.
When someone speaks 'derogatively' about a group, they're using language as a tool to reduce that group's standing in society. The adverb form makes the intentionality clear—it's a conscious choice, not an accident.
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