Webster's Revised Unabridged Dictionary · 1913

Penance

Penance , noun

[Old French penance, peneance, Latin paenitentia repentance. See Penitence.]

1.
Repentance. [Obsolete] — Wyclif (Luke xv. 7)
2.
Pain; sorrow; suffering. [Obsolete]
Joy or penance he feeleth none. — Chaucer
3.
(Ecclesiastical) A means of repairing a sin committed, and obtaining pardon for it, consisting partly in the performance of expiatory rites, partly in voluntary submission to a punishment corresponding to the transgression, imposed by a confessor or other ecclesiastical authority. Penance is the fourth of seven sacraments in the Roman Catholic Church. — Schaff-Herzog Encyc
And bitter penance, with an iron whip. — Spenser
Quoth he, “The man hath penance done, And penance more will do.” — Coleridge
4.
Any act performed by a person to atone for an offense to another; an act of atonement. [Colloquial]

Penance , transitive verb

To impose penance; to punish.
Some penanced lady elf. — Keats