15=Sink A lake formed in a depression in the land surface generally in a limestone region communicating with a subterranean passage developed by solution (afterwards becoming blocked so water is retained) or resulting from solution of gypsum and rock salt or by the collapse of a cavern roof.
(A lake; formed; L:in a depression in the land surface; L:generally in a limestone region) (water; is retained; ) (a limestone region; communicating; with a subterranean passage) (a subterranean passage; developed; by solution)
A lake water a limestone region a subterranean passage
formed is retained communicating developed
L:in a depression in the land surface L:generally in a limestone region
with a subterranean passage
by solution