To separate, detach, or isolate.
To separate a body or material from others, e.g. by non-conductors to prevent the transfer of electricity, heat, etc.
To implement safeguarding.
To escort safely.
To protect, to keep safe.
A safe-conduct or passport, especially in time of war.
Something that serves as a guard or protection; a defense.
One who, or that which, defends or protects; defence; protection.