to fully understand an idea or some information so that you are able to use it yourself

to become, or cause somebody to become, a part of a country or community rather than remaining in a separate group

New arrivals feel the pressure to assimilate.

As a Chinese teen I tried to assimilate into Canadian culture.

Over time different groups were assimilated into the community.

to make an idea, a person’s attitude, etc. fit into something or be acceptable

These changes were gradually assimilated into everyday life.

LEARNit Dictionary