ぎっしり
ぎっしり · gisshiri · JLPT N2 · adverb
tightly
📦 Doubled っ slams the sound shut, like a jam-packed box: ぎっしり = no gaps left
Sound symbolism: the sokuon っ makes a hard stop, so the sound feels clamped shut. Use it for packed crowds, stuffed bags, and full schedules.