This is the 11398th most frequent Korean word.
깃발을
"깃발을" means "flag" in English (in the accusative form).
In this sentence, '깃발을' (flags) is used as the object of the verb '흔들며' (waving). It shows its literal usage as a physical flag.
아이들이 깃발을 흔들며 행진하고 있었다.
The children were marching while waving flags.
Here, '깃발을' is used metaphorically to represent a cause or a rallying symbol, embodying an abstract concept.
그는 정의를 향한 깃발을 높이 들었다.
He raised the flag for justice high.
In this context, '깃발을' refers to a specific flag that serves a functional purpose of identification.