보이자

In a sentence

• 우리가 함께하면 더 좋은 세상이 보이자.

  When we are together, a better world becomes visible.

  In this sentence, '보이자' implies the act of becoming visible or perceivable.

• 저 산꼭대기에서 아름다운 경치가 보이자 정말 놀랐다.

  At the mountain top, when the beautiful scenery became visible, I was truly amazed.

  Here, '보이자' is used to indicate the moment something becomes visibly apparent.

• 그가 나에게 다가오자 그의 얼굴이 차츰 보이자 나는 긴장했다.

  As he approached me and his face started becoming visible, I became nervous.

  In this case, '보이자' signifies the emergent visibility of a specific object, his face, as a sequence of actions.