Inhumane is a related term of fiendish.
As adjectives the difference between inhumane and fiendish
is that inhumane is lacking pity or compassion for misery and suffering; cruel, unkind, not humane while fiendish is sinister; evil; conniving; in the manner of a fiend.
inhumane
English
Adjective
(
en adjective)
lacking pity or compassion for misery and suffering; cruel, unkind, not humane.
Antonyms
* humane
----
fiendish
English
Adjective
(
en adjective)
Sinister; evil; conniving; in the manner of a fiend.
Derived terms
* fiendishly
* fiendishness
Anagrams
* finished