놀이를

play; games

→ 놀이
phrase Rare #30,733
play; games 놀이 means “play” or “game,” and 를 marks it as the object of the verb.
KO: 아이들이 공원에서 놀이를 했어요.
EN: The children played at the park.

여자들은 카드 놀이를 했고 애들 낳을 때 병원에 처음 나타난 사람들은 미키와 지미 였다

The women played cards, and Mickey and Jimmy were the first to show up at the hospital when the babies were born.

— 좋은 친구들 (1990)

발사대 놀이를 했지

We played with a launch pad.

— 크리에이터 (2023)