R

Run away :To escape or flee from a place or situation. 
        The child decided to run away from home. 

Run into : To meet or encounter someone by chance. 
         I ran into an old friend at the grocery store

Run off: To leave quickly or suddenly. 
       He ran off without saying goodbye. 

Run out (of) :To use up or exhaust the supply of something. 
       We ran out of milk, so I need to go to the store.