Antifreeze is a liquid that lowers the freezing point of water. People put antifreeze in cars so water in the engine doesn't freeze.

When water or another liquid freezes, it becomes a solid. A word starting with the prefix anti works against something. Antifreeze is a synthetic liquid that keeps water (or another liquid) from freezing by lowering the freezing point. This is important for many kinds of engines, such as car engines. In climates with very low temperatures in winter, putting antifreeze in cars is important. Antifreeze is crucial to many other machines and gadgets, because frozen liquid can disturb their operation.

Definitions of antifreeze
  1. noun
    a liquid added to the water in a cooling system to lower its freezing point
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    ethanediol, ethylene glycol, glycol
    a sweet but poisonous syrupy liquid used as an antifreeze and solvent
    propanediol, propylene glycol
    a sweet colorless, viscous, hygroscopic liquid used as an antifreeze and in brake fluid and also as a humectant in cosmetics and personal care items although it can be absorbed through the skin with harmful effects
    type of:
    a substance that is liquid at room temperature and pressure
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