In a dainty manner; with delicacy, refinement, or careful fastidiousness.
Formed by adding the -ly suffix (creating adverbs) to dainty. The -ly adverb suffix comes from Old English -lice, originally meaning 'in the manner of a body.'
When you add -ly to an adjective, you're essentially saying 'in the manner of that quality'—so daintily means 'in the manner of being dainty,' and it's how most adverbs in English are formed!
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