Inhumane is a related term of relentless.
As adjectives the difference between inhumane and relentless
is that inhumane is lacking pity or compassion for misery and suffering; cruel, unkind, not humane while relentless is unrelenting or unyielding in severity.
inhumane
English
Adjective
(
en adjective)
lacking pity or compassion for misery and suffering; cruel, unkind, not humane.
Antonyms
* humane
----
relentless
English
Adjective
(
en adjective)
Unrelenting or unyielding in severity
Unremitting, steady and persistent
Derived terms
* relentlessness