Sekirov Dictionary

be one's own worst enemy

UK /biː wʌnz‿ˌəʊn wɜːst‿ˈɛnɪmi/US /bi wʌnz‿ˌoʊn wɜɹst‿ˈɛnəmi/

verb1

•
To act contrary to one's own interests; to cause problems for oneself; to self-sabotage.
- 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. — 1881

forms

was one's own worst enemy · been one's own worst enemy · being one's own worst enemy · is one's own worst enemy

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