involved
US /ɪnˈvɑːlvd/
UK /ɪnˈvɑːlvd/

1.
connected with something or participating in an activity or event
:
•
She got deeply involved in the community project.
•
Are you involved in any sports?
2.
difficult to understand; complicated
:
•
The plot of the movie was too involved for me to follow.
•
He gave an involved explanation of the theory.
1.
past participle of 'involve'
:
•
The investigation involved many hours of work.
•
He was involved in a car accident.