The term 'Put Six Feet Under' is a phrase used to describe the act of burying someone. The two crossword solutions for this term are INTER and BURY. INTER is a 5 letter word meaning to place in a grave or tomb, while BURY is a 4 letter word meaning to place in the ground and cover with earth. Therefore, the phrase 'Put Six Feet Under' can be interpreted as placing someone in a grave and covering them with earth.