v. To regress; to slip backwards or revert to a previous, worse state.
v. To shirk responsibility; to renege on one's obligations or commitments.
the GNU version of the Collaborative International Dictionary of English
verb-intransitive. To slide back; to fall away; esp. to abandon gradually the faith and practice of a religion that has been professed.
The Century Dictionary and Cyclopedia
To slide back, in a figurative sense; apostatize; turn from the faith; depart from or abandon religious principles or practices.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. drop to a lower level, as in one's morals or standards
Word Usage
"I find in myself a natural aversion to my duty, and to spiritual and divine exercises, and a propensity to that which is evil, such an inclination towards the world and the flesh as amounts to a propensity to backslide from the living"