In a grand, impressive, or magnificent manner; with an air of greatness or dignity.
Formed from 'grand' plus the suffix '-ly,' which converts adjectives into adverbs. This follows the most common English pattern for creating adverbs describing manner.
The adverb 'grandly' appears throughout literature to describe characters acting with dignity or pomposity—when a character 'grandly declared,' they were usually being dramatic or self-important, often for comedic effect!
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