Which word is defined as to dry out thoroughly?

The term that is defined as to dry out thoroughly is "desiccate." This word originates from the Latin "desiccatus," which means to dry up or remove moisture. In various contexts, "desiccate" can refer to the process of removing water from a substance, such as food preservation methods where moisture is removed to inhibit spoilage and prolong shelf life. It is commonly used in scientific and culinary fields to describe the thorough drying of materials.

In contrast, the other words listed do not share this meaning. "Dichotomy" refers to a division into two contrasting parts, "diatribe" is a bitter and abusive criticism or attack, and "differentiated" relates to distinguishing or being made distinct. Therefore, "desiccate" stands out as the term associated with the process of drying out completely.