Apostasy.

Abandonment or renunciation of one's religious faith or moral allegiance.

The action of relapsing into sin or error; backsliding, apostasy. In later use: spec. = recidivism, n. Also: an instance of this.

The action of perverting or condition of being perverted; the action of turning aside from what is true or right; the diversion of something from…

The action or an act of falling back into error, sin, or wrongdoing; a return to an undesirable state or activity. Also with into.

Recurrence of a disease; relapse.

figurative. Departure from a given state or course; falling away; secession, desertion, apostasy.

Probably an editorial misreading of recidivation, n. (independently in two separate instances for two different senses; compare respectively recidiv…

With verbal nouns forming nouns, as backsliding, n., back-coming, back-drawing, back-going, back-looking, back-slipping, back-starting, back-surging…

The action of a backslider, falling away, apostasy.

Repudiation, rejection, esp. of the Devil; recantation, retraction; an instance of this.

A person who breaks allegiance or faith, or neglects a duty; an apostate, a deserter. Also gen., as a term of abuse: a villain.

Backsliding, apostatizing, falling away.

The action of relapse, v. (in various senses); an instance of this.

Apostatizing.

Backsliding, recidivation; an instance of this.

Renunciation of faith or principles. Often attributive.

A lapsing or apostatizing from the faith, a falling into heresy. Also, in weaker sense, an involuntary deviation from one's principles or rule of…

The practice of apostatizing.

The behaviour and practices of a renegade.