Strong's #415: aneleemon (pronounced an-eleh-ay'-mone)
from 1 (as a negative particle) and 1655; merciless:--unmerciful.
Thayer's Greek Lexicon:
̓́
aneleēmōn
1) without mercy, merciless
Part of Speech: adjective
Relation: from G1 (as a negative particle) and G1655
Citing in TDNT: 2:487, 222
Usage:
This word is used 1 times:
Romans 1:31: "covenant breakers, without natural affection, implacable, unmerciful:"