be one's own worst enemy
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be one's own worst enemy (third-person singular simple present is one's own worst enemy, present participle being one's own worst enemy, simple past was one's own worst enemy, past participle been one's own worst enemy)
- (idiomatic) To cause problems for one's self, act contrary to one's own interest, self-sabotage.
- She's her own worst enemy.
- 1870, Mary Dwinell Chellis, Mark Dunning's Enemy, page 27:
- “Mark is his own worst enemy. Good night.” True. No enemy however powerful and malicious, can so work a man's ruin as his own unbridled passions and depraved appetites.
- 1881 , Charles Thornton Forster & F.H. Blackburne Daniell, The Life and Letters of Ogier Ghiselin de Busbecq, translation from the Latin of Legationis Turcicae epistolae quatuor by Ogier Ghiselin de Busbecq, page 221:
- For each man is his own worst enemy, and has no foe more deadly than his own intemperance, which is sure to kill him, if the enemy be not quick.
- “be one's own worst enemy”, in Lexico, Dictionary.com; Oxford University Press, 2019–present.
- “be your own worst enemy” in Longman Dictionary of Contemporary English, Longman.
- “be your own worst enemy” in the Cambridge English Dictionary, Cambridge: Cambridge University Press.
- “be your own worst enemy” (US) / “be your own worst enemy” (UK) in Macmillan English Dictionary.