Dig in to is a phrasal verb that means to start eating something eagerly or to start doing something with enthusiasm. The antonyms for this phrasal verb can vary depending on the context it is used in. For example, the antonyms for starting to eat something eagerly could be to refrain, abstain, or avoid eating entirely. In the case of starting to do something with enthusiasm, the antonyms could be to procrastinate, delay, or put off doing the task. It is important to note that the antonyms for "dig in to" may not necessarily be exact opposites, but rather actions that have the opposite effect of what the phrasal verb implies.