The dusky predawn prevented him from identifying anything but snow and ice.

Our job is to prevent them from getting here or identifying them once they do.

The gloom prevented me from positively identifying the new impressions.

Their speed and the darkness prevented me from identifying their species.

Both girls were killed to prevent them from identifying their assailants.

However, it wasn't curved enough to prevent the passenger from easily identifying and using the vehicle's main controls as well.

The group is deliberately decentralized, he said, to prevent the authorities from identifying its leaders.

That could only be for one reason: to prevent them from identifying their captors and describing where they had been held prisoner.

A state law prevents the grand jury, in such a report, from identifying either the hospital or anyone involved in the case.

She said bureau regulations prevented her from identifying the halfway house.