In a way that dazzles; with brilliant light, impressive beauty, or stunning effect.
From 'dazzle' plus the adverbial suffix '-ing' and '-ly.' This layered suffix construction (verb → present participle → adverb) is a common way English creates intensifying adverbs to describe actions performed in a striking manner.
The '-ing' in 'dazzlingly' doesn't mean the action is happening right now — it's actually a fossilized form from Old English where '-ingly' was already combined before becoming our modern '-ly' suffix, which is why 'dazzlingly' has that extra morphological layer!
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