bottomless
adjective2 搭配平均频率: 5.8
无底洞
Refers to a very deep hole that appears to have no bottom, often used metaphorically for an endless supply or demand.
指似乎没有底的洞,常用于比喻。
无底潭
Refers to a body of water, like a swimming pool or natural pond, that is extremely deep.
似乎没有底的水潭;极深。