undoing

From Wiktionary

Pronunciation[change]

Noun[change]

Singular
undoing

Plural
undoings

  1. (usually singular) Somebody's undoing is the thing that causes them major problems, causes them to fail, or causes them to be discovered.
    He left behind a laptop computer loaded with details that would prove to be his undoing.

Verb[change]

Plain form
undo

Third-person singular
undoes

Past tense
undid

Past participle
undone

Present participle
undoing

  1. The present participle of undo.