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Webster 1913 Edition

Noun.

Want of piety.

[Obs.]

unpity ‎(uncountable)

The lack or absence of pity; pitilessness; ruthlessness.
- 1965, Justine, Philosophy in the Bedroom, and other Writings:
  Destroy, with entire unpity, raze to the ground, those detestable houses where you billet the progeny of the libertinage of the poor, appalling cloacas, wherefrom there every day spews forth into society a swarm of new-made creatures whose [...]