This is the 759th most frequent Korean word.
가득
"Fully" or "completely filled."
가득 is used here to describe the bowl being full to its capacity with water.
그릇에 물이 가득 찼다.
The bowl is filled with water.
가득 is used metaphorically to express the heart being completely full of joy.
그는 기쁨으로 마음이 가득 차 있었다.
His heart was filled with joy.
가득 describes the desk being fully covered with documents in this context.