What's the difference between shrive and shriven?

Shrive

Definition:

• (v. t.) To hear or receive the confession of; to administer confession and absolution to; -- said of a priest as the agent.
• (v. t.) To confess, and receive absolution; -- used reflexively.
• (v. i.) To receive confessions, as a priest; to administer confession and absolution.

Example Sentences:

Shriven

Definition:

• (p. p.) of Shrive
• () p. p. of Shrive.

Example Sentences:

• (1) At one point the wretched man grovellingly confessed to having failed, but if he was shriven of his sins by the archbish, I missed it.