Generally, it is possible to write-protect some selected parts (as video clips) to prevent erasure.

It had been easy to coax her into believing he was her husband's spirit; the only difficult part had been preventing himself from claiming marital rights.

But a key part of automotive safety is preventing accidents, and one of the best ways to do that is to take drivers out of the equation.

A microsurgeon needs all available parts of human tissue to cover the wound at the stump and thus to prevent further shortening of the stump.

A part of living through the raid wasn't only eliminating his opponents, but preventing them from killing him.

Selectively disabling parts of the system to prevent the user from uninstalling the malware.

"It is not going be a decisive meeting, but part of the process to prevent the widening of the war."

The physical part of our nature prevents it.

But at Israeli insistence, part of the newly transferred land would be declared a nature reserve - not for ecological reasons, but to prevent new construction.

Should it become a real asset manager for parts of the global savings pool, second-guessing speculators, preventing panic, stabilising markets?