Use the noun shrift to describe the act of confessing, especially to a priest.

Shrift is an old-fashioned way to talk about the traditional religious ritual of confession and absolution. Shrift comes from the equally antique word shrive, which is what a priest does when he hears a confession. The phrase "short shrift" began as a description of the brief chance a condemned prisoner had to confess his sins before being put to death, and evolved to mean "to dismiss with little consideration."

Definitions of shrift

n the act of being shriven

Type of:
(Roman Catholic Church) the act of a penitent disclosing his sinfulness before a priest in the sacrament of penance in the hope of absolution

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