The synonym for the word "pounded into" can be "hammered", "beaten", or "thrashed". These words indicate a forceful action that is used to make something enter into one's mind persistently. Other options include "drilled", "impressed", and "ingrained". These words signify the repetition and intensity of the action that is being performed on the mind. It implies that something is being learned or internalized through repeated and hard work. The synonyms for "pounded into" provide a richer understanding of the action and the impact it can have on the receiver. They demonstrate the force and intensity that is required to make a lasting impression.