noun
immersion
ih-MUR-zhun/ɪˈmɜːrʒn/
Deep involvement in an activity or surrounding environment.
The artist's immersion in the sculpture is evident in the intent posture and careful hands.

Etymology
A physical plunging into something broadened into mental absorption in an activity or situation.
More examples
- Language immersion fills the day with conversation.
- His immersion in the project leaves little time for hobbies.
Forms
immersion
Similar words
- absorption
- Emphasizes focused mental involvement.
- involvement
- A broader term that need not imply great depth.