sorb

[ladorada]

how do you name the place where a small river or a brook dissappears underground entering suddenly under the rocks of a cave?

in Romanian this is "sorb" and probably "to absorb" might be related to it.

[jake-the-peg]

A swallow hole or possibly a sink or sinkhole

http://www.thefreedictionary.com/swallow+hole

[ladorada]

Thank you.