Syntax:  ERASE PREVIOUS WORD

  Erases the word before the cursor.

  When the cursor is in the middle of a word, the entire word is erased
  and the cursor moves to the first letter of the next word.  For more
  information about the definition of a word, see the ERASE WORD
  command.

  RELATED COMMANDS:

     ERASE END OF WORD           ERASE WORD
     ERASE NEXT WORD             RESTORE
     ERASE START OF WORD