In a manner that flares; in a way that involves sudden bright light, conspicuous display, or obvious manner.
From 'flaring' (present participle of 'flare') plus the adverb suffix '-ly.' The '-ly' suffix transforms adjectives into adverbs that describe how an action occurs.
The '-ly' suffix evolved from the Old English word 'like,' which is why '-like' and '-ly' are related—medieval scribes wrote so quickly that 'like' became abbreviated and fused to adjectives, creating our modern adverbs.
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