To escort safely.
To implement safeguarding.
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.
Doubt; the condition of being uncertain or without conviction.
A parameter that measures the dispersion of a range of measured values.
Something uncertain or ambiguous.