Underbake refers to baking food products for a shorter amount of time than required or at a lower temperature, resulting in an unfinished or semi-cooked product. Some synonyms for underbake include "half-baked," "partially cooked," "not fully baked," and "underdone." These terms can be applied to a variety of baked goods, including bread, cakes, pastries, and cookies. Underbaking can result in a doughy texture and can be problematic for certain recipes that require a certain level of doneness. As such, it's always best to follow recipe instructions to ensure that your baked goods are cooked to perfection.