This is the 846th most frequent Korean word.
행동을
"행동을" means "action" or "behavior" (accusative form).
Here, '행동을' is part of the phrase '행동을 합니다,' meaning 'acts' or 'takes action'.
그는 항상 조심스럽게 행동을 합니다.
He always acts cautiously.
In this sentence, '행동을' is used in '행동을 보였어요,' translating to 'demonstrated behavior'.
어려운 상황에서도 그녀는 적절한 행동을 보였어요.
Even in difficult situations, she demonstrated appropriate behavior.
This usage of '행동을' means 'an action' in the phrase '행동을 하기,' implying 'taking action.'