Lightning split the sky like a sharp sword.
Meaning: This sentence compares the lightning's ability to cut through the sky to the sharpness of a sword, emphasizing its piercing and powerful nature.
Choice of Words: Split means to divide something into two or more parts. Sword is a weapon with a long, sharp blade. Sharp means having a keen edge or point. When you put them together, "Lightning split the sky like a sharp sword" means that the lightning divided the sky into two parts, similar to how a sword cuts through something.
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