This is the 3747th most frequent Japanese word.
ずっしり
Heavily; weightily; profoundly.
Here, 'ずっしり' is used as an adverb to express the palpable heft or weight of the box, emphasizing its substantial mass.
この箱はずっしりと重い。
This box is heavy.
'ずっしり' conveys a metaphoric heaviness to express the significance and depth of emotional weight.
祖父の思い出がずっしり心に残っている。
My grandfather's memories remain deeply in my heart.
'ずっしり' is used here to describe the profound and impactful resonance of the bell's sound.