This is the 2277th most frequent Korean word.
한데
"한데" means "together" or "in one place."
Here, '한데' is used to mean 'together' or 'in one place', expressing the idea of gathering people into one location.
모두 한데 모여서 사진을 찍자.
Let's all gather together and take a picture.
In this sentence, '한데' describes a centralized state, where water accumulates in a singular location.
비가 와서 물이 한데 모였어요.
Because it rained, water pooled together.
Here, '한데' emphasizes unity and cooperation, implying people coming together harmoniously.