1. undoing - Noun
2. undoing - Verb
The reversal of what has been done.
Ruin.
Source: Webster's dictionaryDoing nothing for others is the undoing of ourselves. Horace Mann
Art is the means we have of undoing the damage of haste. It's what everything else isn't. Theodore Roethke
Once the return tide starts, it will be impossible to stem it, and it will prove our undoing. Moshe Sharett
For an ant to have wings would be his undoing. Persian Proverb
Do not neglect the undoing for the setting. Swahili Proverb
Love one another and do not strive for another's undoing. Seneca Proverb