safeguard

Noun

• a document or escort providing safe passage through a region especially in time of war

• a precautionary measure warding off impending danger or damage or injury etc.
  • he put an ice pack on the injury as a precaution
    
  • an insurance policy is a good safeguard
    
  • we let our guard down
    

Verb

• escort safely

• make safe

Related words

• Synonyms: 
  safe-conduct , precaution , guard