Strong's G415 — ἀνελεήμων (adjective)
aneleemon (an-eh-leh-ay'-mown) adj.
1. merciless
[from G1 (as a negative particle) and G1655]
KJV: unmerciful 
Root(s): G1, G1655 
Hebrew root: ἐλεήμων
Occurrences: 1