Riddle: What is that which the dead and living do at the same time?
In this riddle the answer’s feature of being heteronym is benefited to confuse you and make it harder for you to find the answer. However, the answer is not so hard to figure out after all.
One who wants to solve this riddle need to think about a word in English dictionary that has two meaning that one can be done by a living person and the other can be done by even a dead person. The first thing that comes to minds is the word lie since it can both mean not telling the truth and to be in a horizontal position on a surface.
The answer is: Lie.