In a way that is clearly different, recognizable, or characteristic; in a manner that stands out or distinguishes something.
From distinctive (distinct + -ive adjective suffix) + -ly adverb suffix. The -ly suffix converts adjectives into adverbs describing how something is done.
Adding '-ly' to adjectives to make adverbs is such a fundamental English pattern that we barely notice it, but it's one of the most productive word-building processes in the entire language!
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