An unexpected obstruction stood in the way of the project's progress.

His actions obstructed our plans.

He printed posters using an old mimeograph.

He was diagnosed with stomach cancer.

He knew that she would be annoyed by his proposal.

There is no uncleanliness in his heart.

This river was polluted by the waste from the factory.

There are a lot of new art supplies in my room.

He dares to be late again.

He stooped to pick up the ball.