There are several synonyms for the phrase "immerse yourself in something" which means to become completely involved in and focused on a particular activity or subject. To deeply engage in something, one can use words like "plunge into," "lose oneself in," "get absorbed in," "engulf oneself in," "dip into," or "bury oneself in." These synonyms suggest a level of dedication and focus on the activity or subject at hand. Whether it's reading a book, practicing a new skill, or exploring a new hobby, immersing oneself in something allows for a deeper understanding and appreciation of the experience.