Becoming liquid is a process of transforming from solid to liquid state. The antonyms for this process would be solidify or freeze. When a substance solidifies, it goes from a liquid to a solid state. This could be observed when water is left in a freezer, and it turns into ice. Conversely, when a substance freezes to a solid state, it cannot become liquid again unless it is heated. The concept of becoming liquid or solidifying is relevant in many scientific fields, including chemistry, geology, and metallurgy. Understanding antonyms such as solidify or freeze is crucial in many of these fields while describing phase changes in substances.