A pool that is small in diameter, but deep, usually resulting from erosion by a natural force such as a waterfall or rapids.
Waterfall model
A waterfall-like outpouring of liquid, smoke, etc.
A flow of water over the edge of a cliff.
The action of drinking from a vessel without touching it with the lips, considered more sanitary for a shared vessel.
To drink (something) from a container by pouring it from a height so as not to touch one's lips to the rim.
To fall like a waterfall.
Synonym of recycle