In-gest, meaning to take in food or drink, has a few antonyms. One of the most common antonyms for in-gest is egest, which means to expel or eliminate waste matter from the body. Other antonyms could include abjure, which means to renounce or reject, or abstain, meaning to refrain from consuming something. However, these antonyms are not commonly used in this context. Overall, in-gest is a fairly specific term, so it may be more useful to focus on related terms such as digestion or consumption when looking for antonyms.