Parched, waterless (4)
I believe the answer is:
arid
I believe this is a double definition.
'parched' is the first definition.
(I've seen this before)
'waterless' is the second definition.
(synonyms)
(Other definitions for arid that I've seen before include "Dry and unfertile" , "Rainless (region)" , "water shortage?" , "Without water" , "Tedious; short of rain" .)