Lightning flashes brightly, illuminating the dark sky.
Meaning: The sentence is describing how a sudden flash of light in the sky caused by electricity makes the dark sky light up.
Choice of Words: Lightning is a sudden flash of light in the sky caused by electricity, Flashes means to shine suddenly and brightly, Brightly means with a lot of light, Illuminating means to make something light up, Dark means having little or no light, and Sky is the upper part of the atmosphere as seen from the Earth.
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Related Expressions