To slip or slide back physically; to turn back.
To fall back again; to slide or turn back into a former state or practice.
To return to a vice, especially self-harm or alcoholism, failing to maintain abstinence.
To recur; to worsen, be aggravated (after a period of improvement).
An occasion when a person becomes ill again after a period of improvement
The act or situation of relapsing.
To turn (something) upside down, to invert (something).