This is the 16400th most frequent Korean word.
비행을
"비행을" means "flight" or "flying."
In this context, '비행을' is used to describe the method of traveling via flying.
비행을 통해 많은 나라들을 방문했어요.
I visited many countries through flying.
In this sentence, '비행을' ('flying') is used as a verb noun linked to the act of flying or the activity related to aviation.
비행을 좋아하는 사람들은 그의 삶을 즐깁니다.
People who like flying enjoy their lives.
Here, '비행을' refers to the act of planning specific instances of flight.