This is the 9510th most frequent Korean word.
경비원이
"경비원이" means "security guard" in English.
In this sentence, "경비원이" is used as the subject, referring to the security guard who is performing the action of greeting.
경비원이 건물 입구에서 방문객을 맞이합니다.
The security guard greets visitors at the building entrance.
Here, "경비원이" identifies the subject who is actively engaged in inspecting the equipment.
경비원이 작동 중인 감시 장비를 점검하고 있습니다.
The security guard is inspecting the operational surveillance equipment.
"경비원이" specifies the role as the subject responsible for the action of patrolling.