involvement

♦ in|volve|ment /ɪnv'ɒlvmənt/ (involvements)
1 [N-UNCOUNT] oft N in/with n
Your involvement in something is the fact that you are taking part in it.
She disliked his involvement with the group and disliked his friends.
2 [N-UNCOUNT]
Involvement is the enthusiasm that you feel when you care deeply about something.
Ben has always felt a deep involvement with animals.
3 [N-VAR]
An involvement is a close relationship between two people, especially if they are not married to each other.
They were very good friends but there was no romantic involvement...