All 5 Uses

penance
in
The Chrysalids
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The penance of Tribulation that had been put upon the world must be worked out, the long climb faithfully retraced, and, at last, if the temptations by the way were resisted, there would be the reward of forgiveness — the restoration of the Golden Age.†
Chpt 4
Such penances had been sent before: the expulsion from Eden, the Flood, pestilences, the destruction of the Cities of the Plain, the Captivity.†
Chpt 4 *
Then do your penances that you may be cleansed.†
Chpt 7
And for her to think that you might abet her, when she knows that you yourself have had to make your own penances twice!†
Chpt 7
It'd have been a public shaming on a Sunday, a week of penances, and a tenth of all he had,' he told me, forcibly.†
Chpt 9

Definitions:

(1) (penance)
an act that shows sorrow for wrongdoing -- such as expressing regret, asking for forgiveness, or trying to make up for the harm done
(2) (meaning too rare to warrant focus)