Balloons fill air.

Meaning: This means that the balloons are being inflated with air or another gas so that they can float or be used for decoration. It's like saying, The balloons are being filled up with air.

Choice of Words: Balloons are light, flexible bags that can be inflated with air, helium, or another gas. Fill means to make something full by putting something inside it. Air is the mixture of gases that surrounds the Earth and is breathed by living beings. When you put them together, "Balloons fill air" means that the balloons are being filled with air or another gas.

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Related Expressions