The clouds floated gently across the sky.
Meaning: The visible masses of water droplets or ice crystals moved smoothly and effortlessly in the upper part of the atmosphere.
Choice of Words: Clouds are visible masses of water droplets or ice crystals suspended in the atmosphere. Floated means to move smoothly and effortlessly through the air or water. Gently means in a soft and delicate manner. Sky is the upper part of the atmosphere.
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Related Expressions