Eyes sparkle bright.
Meaning: This means the organs of sight are shining with flashes of light. It's like saying, The organs of sight are shining brightly with flashes of light.
Choice of Words: Eyes is a plural noun referring to the organs of sight. Sparkle is a verb meaning to shine with flashes of light. Bright is an adjective describing something full of light or color. The sentence conveys the idea of the organs of sight shining with flashes of light.
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Related Expressions