They are co-responsible for the success of the project.

The co-selector is responsible for choosing the best candidates for the job.

The co-selectors have chosen the best candidate for the job.

The co-directions of the two roads made it easy to navigate.

I am participating in a co-counseling session.

I attended a conference with several co-linguists.

She is my co-linguist in the French class.

They are co-sponsoring the event.

The bill has multiple co-sponsors from both parties.

Several senators co-sponsor the bill.