Strong's #448: anileos (pronounced an-ee'-leh-oce)
from 1 (as a negative particle) and 2436; inexorable:--without mercy.
Thayer's Greek Lexicon:
̓́
anileōs
1) without mercy, merciless
Part of Speech: adjective
Relation: from G1 (as a negative particle) and G2436
Usage:
This word is used 1 times:
James 2:13: "For he shall have judgment without mercy, that hath showed no mercy; and mercy"