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deep pool; deep water; abyss
depths (e.g. of despair); grip (e.g. of death)
淵の底に光が差し込んだ。
Light shone into the depths of the pool.
川の渕で魚が泳いでいる。
Fish are swimming in the pool of the river.
川の淵で魚を見つけた。
I found fish at the edge of the river.