entailed

The part entailed physically burying himself in another body.

Organizers quickly realized it was a misunderstanding—one game had entailed throwing water balloons at an inflatable doll in a test of accuracy.

Parkinson indicated that one factor in securing a conviction would have entailed proving that China was an "enemy" as stated in the Official Secrets Act 1911.

Barnier and Bayrou were also brought down as a result of their proposed budgets, which would have entailed substantial cuts - with politicians on the left instead calling for tax rises.

I do not need to repeat these details here, other than to note that they inevitably entailed a considerable degree of complexity.