In a way that shows careful judgment or distinction between things, often unfairly favoring some over others.
From discriminate (Latin discriminare, 'to separate') plus -ly adverbial suffix. The word evolved from its neutral 'to distinguish' meaning to often imply unfair or prejudicial selection.
Interestingly, 'discriminate' started as morally neutral—just meaning 'to tell apart'—but over time it gained negative connotations when people used it for unfair treatment.
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