Unmerciful (415) (aneleemon from a = without + eleemon = merciful) is used only here in the NT and means not compassionate. Aneleemon applies to those who do not feel for the distresses of others, whatever may be the cause of their distresses; and to those who inflict these distresses it peculiarly applies. William Barclay adds There never was a time when human life was so cheap. A slave could be killed or tortured by his master, for he was only a thing and the law gave his master unlimited power over him. In a wealthy household a slave was bringing in a tray of crystal glasses. He stumbled and a glass fell and broke. There and then his master had him flung into the fish pond in the middle of the courtyard where the savage lampreys devoured his living flesh. It was an age pitiless in its very pleasures, for it was the great age of the gladiatorial games where people found their delight in seeing men kill each other. It was an age when the quality of mercy was gone. (Daily Study Bible Online) "Copy and paste the address below into your web browser in order to go to the original page which will allow you to access live links related to the material on this page - these links include Scriptures (which can be read in context), Scripture pop-ups on mouse over, and a variety of related resources such as Bible dictionary articles, commentaries, sermon notes and theological journal articles related to the topic under discussion." http://www.preceptaustin.org/romans_129-31.htm#unmerciful