In a dandyish manner; with the characteristics of a dandy's behavior or appearance.
From 'dandy' plus the suffix '-ic' plus the adverbial suffix '-ally,' representing an alternative formation to 'dandiacally'.
English loves creating multiple ways to express the same idea—dandically, dandyishly, dandiacally—all mean roughly the same thing but feel different, which is why we call English 'beautiful but illogical'!
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