Rainbows appeared magically.
Meaning: This means the rainbows suddenly became visible in the sky, as if by magic.
Choice of Words: Rainbows are colorful arcs in the sky caused by the refraction and dispersion of sunlight through water droplets. Appeared means to come into sight or view. Magically means in a way that seems to be impossible or supernatural. When you say "rainbows appeared magically," you're describing the rainbows suddenly becoming visible in the sky.
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Related Expressions