Interiorize, also known as internalize, is a term used to describe the process of absorbing or taking in something fully, usually mentally or emotionally. It can refer to any process that involves deepening one's understanding of a concept, idea, or feeling. Some common synonyms for the word interiorize include internalize, assimilate, imbibe, incorporate, and infuse. Each of these words reflects the idea of acquiring knowledge or experience in a thorough and complete way. Whether you are trying to convey the idea of deepening your understanding of a particular topic or simply absorbing a feeling or emotion, one of these synonyms for interiorize is sure to fit the bill.