(military) The line of battle of one's enemy. / (military, also figuratively, usually in the plural) The boundary of the territory controlled by the enemy.

(idiomatic) To cause problems for one's self, act contrary to one's own interest, self-sabotage.

a person accused of crimes against the state, such as treason

When you notice that an enemy is making an error, take care not to interfere with the enemy from completing it so you can take advantage at the right time.

Offensive and hostile action carried out by an enemy country's military forces, especially during a war.

Third-person singular simple present indicative form of be one's own worst enemy

past participle of be one's own worst enemy

simple past tense of be one's own worst enemy

present participle of be one's own worst enemy

An individual who is greatly disliked. / (informal) An object or concept considered very bad or harmful.