Antonyms for the word "humectation" include "drying," "dehydration," "absorption," "desiccation," and "evaporation." Drying refers to the removal of moisture from a substance, while dehydration specifically means the removal of water from a person or animal. Absorption describes the process of a material taking in moisture, and desiccation refers to the drying out of a substance or object. Finally, evaporation is the process of a liquid turning into a gas, often resulting in the loss of moisture. These antonyms highlight the importance of balancing moisture levels in various settings, whether it be in people or products.