congeal
Meaning: to thicken into a solid
Usage: The sauce had congealed into a thick paste.
coagulate
Meaning: to thicken, clot
Usage: The top layer of the pudding had coagulated into a thick skin.
desiccated
Meaning: dried up, dehydrated
Usage: The skin of the desiccated mummy looked like old paper.
arid
Meaning: excessively dry
Usage: Little other than palm trees and cacti grow successfully in arid environments.
wizened
Meaning: dry, shrunken, wrinkled
Usage: Agatha’s grandmother, Stephanie, had the most wizened countenance, full of leathery wrinkles.