Cruelty, Harshness
noun, な adjective
The remainder of cruelness is cruelty. There always seems to be plenty to go around, and it kind of sucks.
ざんこく
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
私は、ひどく残酷な決断を迫られました。
I was pressed for an awfully cruel decision.