This is the 6254th most frequent Japanese word.
グチャグチャ
Messy; disorganized; squishy; chaotic.
The word "グチャグチャ" here is used to describe the disorganized and messy state of the room, emphasizing the chaos and clutter present.
部屋中がグチャグチャで足の踏み場もない。
The room is so cluttered that there's no place to step.
In this sentence, "グチャグチャ" describes the logical messiness or disorderliness of his explanation, indicating that its presentation was lacking clarity or structure.
彼の説明はグチャグチャで全然わからなかった。
His explanation was confusing, and I couldn't understand it at all.
Here, "グチャグチャ" is used to depict the physical state of disarray or disorganization caused by the contents of the box being scattered or damaged.