The phrase "sink in to" implies that something is being comprehended or absorbed. Its antonyms include words like reject, resist, ignore, or misunderstand. These words suggest a rejection, denial, or failure to understand something that is important or relevant. For example, if someone is trying to explain a complex concept to you, but you are not willing to listen or learn, you might be accused of resisting or rejecting the information. Similarly, if you are ignoring someone's advice, it may indicate a lack of understanding or appreciation of its value. In short, antonyms for "sink in to" convey a lack of receptivity or understanding.