De-liquescence refers to the process of a substance absorbing moisture and dissolving into a liquid form. The antonyms of de-liquescence are desiccation, dehydration, and evaporation. Desiccation refers to the process of removing water or moisture from a substance, resulting in a dry and solid state. Dehydration, on the other hand, refers to the process of removing water from the human or animal body, leading to a state of dryness and dehydration. Lastly, evaporation refers to the process of turning a liquid into a gas state by heating or increasing the surface area of the substance. Therefore, these antonyms provide a clear distinction from de-liquescence by indicating the opposite process.