Inhuman is a related term of unsparing.
As adjectives the difference between inhuman and unsparing
is that inhuman is of or pertaining to inhumanity and the indifferently cruel, sadistic or barbaric behavior it brings while unsparing is without sparing.
inhuman
English
Adjective
(
en adjective)
Of or pertaining to inhumanity and the indifferently cruel, sadistic or barbaric behavior it brings.
Antonyms
* humane