Wrinkled because the volume has reduced while the surface area of the outer layer has remained constant
A prune is a shriveled plum.
reduced in efficacy or vitality or intensity; "our shriveled receipts during the storm"; "as the project wore on she found her enthusiasm shriveled"; "the dollar's shrunken buying power"
(used especially of vegetation) having lost all moisture; "dried-up grass"; "the desert was edged with sere vegetation"; "shriveled leaves on the unwatered seedlings"; "withered vines"
lean and wrinkled by shrinkage as from age or illness; "the old woman's shriveled skin"; "he looked shriveled and ill"; "a shrunken old man"; "a lanky scarecrow of a man with withered face and lantern jaws"-W
Starkie; "he did well despite hiswithered arm"; "a wizened little man with frizzy gray hair
shriv·el shrivels shrivelling shrivelled in AM, use shriveling, shriveled When something shrivels or when something shrivels it, it becomes dryer and smaller, often with lines in its surface, as a result of losing the water it contains. The plant shrivels and dies. dry weather that shrivelled this summer's crops. Shrivel up means the same as shrivel. The leaves started to shrivel up. + shrivelled shriv·elled It looked old and shrivelled. if something shrivels, or if it is shrivelled, it becomes smaller and its surface becomes covered in lines because it is very dry or old (Perhaps from a language)