* Disengage: This means to withdraw attention or interest from something.
* Relax: This implies a state of being free from worry or stress.
* Distract: This means to draw attention away from something.
* Free: This suggests being liberated from something that is holding your attention.
* Unburden: This means to relieve someone of a worry or responsibility.
The best opposite will depend on the specific situation and the meaning you want to convey.