천진난만해요 · 천진난만했어요 · 천진난만한 (+noun)
innocent, naive, childlike
Example
놀이터에서 아이들의 천진난만한 웃음소리가 들려왔어요.
The children's innocent laughter came from the playground.
Word parts
천 heaven, natural+진 true+난 brilliant+만 overflowing
Literally 'naturally true and brimming over' — pure, unspoiled spirit.
Related words