|Noah Webster's Dictionary|
(a.) Lacking mercy; cruel; unsparing; as, a merciless tyrant; merciless waves.
Merciless (4 Occurrences)
James 2:13 For the man who has had no mercy will be judged without mercy, but mercy takes pride in overcoming judging. (See NAS)
Proverbs 5:9 For fear that you may give your honour to others, and your wealth to strange men: (See RSV)
Proverbs 17:11 An uncontrolled man is only looking for trouble, so a cruel servant will be sent against him. (See NIV)
Jeremiah 30:14 All your lovers have forgotten you; they don't seek you: for I have wounded you with the wound of an enemy, with the chastisement of a cruel one, for the greatness of your iniquity, because your sins were increased. (See RSV)