This is the 10309th most frequent Korean word.
교인이
A "church member."
Here, '교인이' is used as the subject of the sentence, denoting 'churchgoers' in plural form to describe their role in the situation described.
교인이 많아지면서 예배 분위기가 활기차졌다.
As the number of churchgoers increased, the worship atmosphere became lively.
In this sentence, '교인이' is used as the subject and refers to one individual churchgoer in the context of the event.
교인이 정해진 시간에 도착하지 않았다.
A churchgoer did not arrive at the designated time.
In this usage, '교인이' is emphasized to highlight the role of a specific churchgoer performing an altruistic action.