Closed Lake With Internal Drainage
Puzzle 11 of Architectural Styles Hard Pack
Question is: Closed Lake With Internal Drainage
and the answer is: ENDORHEIC
Word Meaning:
ENDORHEIC — (hydrology) Of a basin or lake: having no outflow to an external body of water such as a river or ocean, and only losing water through evaporation or seepage into the ground.
Definitions from Wiktionary.