The obstructionists are preventing progress in the negotiations.

The obstructor blocked the path.

Obstructionisms can hinder progress and prevent effective decision-making.

The obstructors were blocking the entrance to the building.

The obstructedness of the road caused a lot of traffic.

He has an obstructionistic attitude towards change.

He walked obstructedly through the crowded street.

He was driving obstructionally on the highway.

He was obstructingly standing in the doorway.

His obstructivism is causing delays in the project.