Sentence:  Beyond this region spread dead levels, which…resembled the sea. From the city's lofty walls stretched on all sides…flatness and luxuriance. What, then, could taste divine and power accomplish…to transport thither a primeval forest, and to pile up <WSD>coctile</WSD> mountains to place it on. Such was the design of the Hanging Gardens. 
Meaning of the word marked with <WSD> tags:  Built of baked (bricks).