However, the rock slide may not prevent the safe passage of the train.

However, the mouth of the river was obstructed to prevent passage.

This means that there is always water in the pipe preventing the passage of anything from the other direction.

The disagreement so divided Congress in 2002 that for months it prevented passage of the bill to create the department.

The monarch's arrival would stop all debate and prevent passage of the Address.

Only in full spate did the river prevent passage beneath that arch.

The term was also used by the military for barriers set up on roads specifically to prevent the passage of horses.

For a month the investigation into these deals has tied up Japan's parliament, preventing the passage of a budget.

I shall nail some up now, to show, to prevent passage, if I may.

Wide chasms, where the rock had split apart, prevented passage in others.