noun
hollow; pond in a hollow
Rare term for a natural depression or a small body of water that collects in such a hollow.
山道の途中に小さなくぼたまりがあった。
There was a small hollow along the mountain path.
雨が降ると、そのくぼたまりに水がたまる。
When it rains, water collects in that hollow.
Compound of 窪 (kubo, 'hollow') and 溜まり (tamari, 'pool, accumulation'). The exact historical derivation is uncertain.