적을

the enemy

→ 적
phrase Rare #24,428
the enemy 적 means “enemy,” and 을 marks it as the object of the verb.
KO: 적을 발견했어요.
EN: I spotted the enemy.

적을 파악해

Identify the enemy.

— 걸리 보이 (2019)

자네는 적을 죽일 자신 있나?

Are you confident that you can kill the enemy?

— 리전에어 (1998)

적을 준비됐나?

Are you ready to fight the enemy?

— Oldboy (2003)