줄고

In a sentence

• 사람들이 공원에서 뛰는 시간이 줄고 있어요.

  The time people spend running in the park is decreasing.

  Here, '줄고' indicates a decrease in the amount of time that is spent on an activity, specifically running in the park.

• 비가 그친 이후로 하천의 물이 줄고 있습니다.

  After the rain stopped, the water level in the stream has been dropping.

  In this instance, '줄고' refers to a reduction in quantity, namely the water level of the stream.

• 요즘은 사용되지 않는 단어가 점점 줄고 있어요.

  Nowadays, unused words are gradually disappearing.

  Here, '줄고' is applied to indicate a decrease in the presence or occurrence of unused words.