(verb); to protect; to shield; to routinely check up; to care for; to defend; to guard
protect, shield, defend, guard
Safeguard your heart!
Used to confirm your telling the truth and not having a friend on. Onboard Warships a fire would be prefixed with safeguard, safeguard, safeguard, to allow the ships company to know its not an exercise.
Sailor A - I had my way with jenny last night.
Sailor B - No way
Sailor A - SAFEGUARD!!
Sailor B - was she any good then?