uncompassion means lack or absence of compassion; compassionlessness. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From un- + compassion.
noun
- Lack or absence of compassion; compassionlessness.“In this way, they may not be able to fill out their normal span of life; yet, since all must die some time, it is a 'having compassion 'in the midst of uncompassion'.”