Piaculative (pie-AK-yuh-luh-tiv) was coined by T.S. Eliot for his poem “Mr. Eliot’s Sunday Morning Service.” Derived from the Latin for “appease, purify, expiate,” it refers to atonement or reparation – e.g., for a sin or crime.

From the poem:

The sable presbyters approach

The avenue of penitence;

The young are red and pustular

Clutching piaculative pence.