The term "most drenched" refers to something that is thoroughly soaked or saturated with water. Antonyms for this phrase could include "dry," "thirsty," "parched," "arid," "waterless," or "desiccated." These words describe a state where there is a lack of moisture or water. Something that is "dry," for example, is completely devoid of water. "Thirsty" refers to a need for water, but not necessarily a state where something has been soaked or drenched. "Parched" and "arid" suggest a dry, barren landscape, while "waterless" and "desiccated" speak to the lack of moisture in a particular place or object.