When a person suffers from malnutrition, that person lacks sustenance to support his or her life. The “mal-” prefix should indicate this to you, as it expresses “poorly” or “lacking.” The word “sustenance” can be thought of as a “sustaining amount of food.” Thus, the analogy could be rewritten, “As someone suffering from malnutrition lacks sustenance, so does someone or something suffering from desiccation lack X.” Desiccation is the state of being completely dry and lacking fluid.

Annoyance is a type of emotion. Therefore, we are looking to find a word that expresses a "type-of" relationship. Cannons are a type of implement used for warfare. Therefore, they are a type of "armament." The word "arms" often are used to describe such military equipment, as when people speak of "arming" a group for battle.