1. (verb) drop to a lower level, as in one's morals or standards

• lapse

1. (verb) drop to a lower level, as in one's morals or standards

• drop away
• drop off
• fall away
• slip

1. (verb) drop to a lower level, as in one's morals or standards

• backslider
• recidivist
• reversionist
• backsliding
• lapse
• lapsing
• relapse
• relapsing
• reversion
• reverting