WordNet sense 1 ((used especially of vegetation) having lost all moisture):

sear, sere, dried-up, shrivelled, withered

WordNet sense 2 (free from liquid or moisture; lacking natural or normal moisture or depleted of water; or no longer wet):

dry

WordNet sense 3 (lean and wrinkled by shrinkage as from age or illness):

shrunken, wizen, wizened

WordNet sense 4 (lacking excess flesh):

lean, thin

WordNet sense 5 (made less in size or amount or degree):

decreased, reduced