The word "insipid" refers to something that lacks taste or flavor, but there are several antonyms that can be used to describe the opposite. One antonym is "flavorful" which means full of distinctive taste, aroma and flavor. Another antonym is "spicy" which means having a strong, pungent taste or flavor. "Zesty" is also an antonym of "insipid" which means full of flavor, lively, or exciting. Other antonyms of "insipid" include "tasty," "savory," "flavorful," and "appetizing." These antonyms can be used to describe any food or drink that is rich in taste, aroma, and flavor.