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.
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.