plunge basin; waterfall pool
The deep pool formed at the base of a waterfall by the force of falling water.
The water in the plunge basin was very cold.
彼は滝壺に飛び込んだ。
He jumped into the waterfall pool.
滝口 is the brink at the top where a waterfall begins, while 滝壺 is the pool or basin at its base where the water lands.
Standard kanji spelling.
Variant kanji form using 壷; 壺 is more common.
Mixed kanji-kana spelling, often used when the second kanji is less familiar.
Compound of 滝 (taki, 'waterfall') and 壺 (tsubo, 'pot, basin'). The reading つぼ becomes voiced to づぼ (dzu > zu) due to rendaku.