This is the 1748th most frequent Korean word.
전투기를
"전투기를" means "fighter aircraft."
The word '전투기를' acts as the object of the verb '보다' (to see), referring to the aircraft.
나는 전투기를 본 적이 없다.
I have never seen a fighter jet.
The word '전투기를' is used as the object of the participial form of the verb '조종하다' (to control).
전투기를 조종하는 일은 매우 위험하다.
Controlling a fighter jet is very dangerous.
The word '전투기를' is used as the object of the verb '확인하다' (to confirm or spot), identified with the determiner '그' (that).