Clouds move swiftly.

Meaning: This means that the clouds are moving quickly across the sky. It's like saying, The clouds are moving very fast.

Choice of Words: Clouds are large groups of water droplets or ice crystals that float in the sky. Move is a verb that means to change position or location. Swiftly is an adverb that means quickly or rapidly. When you put them together, "Clouds move swiftly" describes the clouds as if they are moving quickly across the sky.

Alternative Expressions

Related Expressions