集まり
あつまり · atsumari · JLPT N3 · noun
gathering
👥 atsumari sounds like at sumo rally, where crowds gather
集まり is the noun form of 集まる (to gather, come together). 集 means collect, the same character as in 集める (to collect). So the word means a gathering of people or a collection of things.
集 — bird 隹 on top of tree 木
集 is an ideograph showing a bird (隹) perched on a tree (木). The original form depicted three birds gathering on a tree, later simplified to one. From 'birds flocking together' it extended to mean 'gather, collect, assemble,' and by extension 'collection' or 'volume' of writings.