undoing

/ənˈduɪŋ/

a cause of someone's failure or downfall

undoing in a sentence

“Overconfidence proved to be his undoing.”

Old English un- reversal + dōn to do; literally reversing what is done

Related Words

nemesis

a long-standing rival; a cause of downfall

nadir

the lowest point in fortune or achievement

abyss

a deep chasm; a catastrophic situation

quagmire

an awkward or complex situation difficult to escape

morass

a complicated or confused situation

shambles

a state of total disorder