The word "be dewing" describes the act of sprinkling small drops of moisture on something, often referring to the morning dew on plants or grass. Antonyms for this word might include "drying," "dehydrating," or "evaporating," which all relate to the opposite effect of removing moisture. Other antonyms could include "withering," "wilting," or "shriveling," which describe the negative impacts of a lack of moisture on plants or other living things. While "be dewing" suggests a fresh, rejuvenating effect, its antonyms bring to mind images of dryness and decay.