Archimedes determined the volume of objects by immersing them in water.
Immersed in study.
The sculptor immersed himself in anatomic studies.
When you put a dish into a sink entirely full of sudsy water, this is an example of when you immerse the dish in the water.
When you become very involved in reading a book, this is an example of a situation where you immerse yourself in a book.
Scholars who immerse themselves in their subjects.