The Collaborative International Dictionary of English v.0.48:

Wizen \Wiz"en\, v. i. [OE. wisenen, AS. wisnian akin to weornian
   to decay, OHG. wesan?n to grow dry, G. verwesen to rot, Icel.
   visna to wither, Sw. vissna, Dan. visne, and probably to L.
   virus an offensive odor, poison. Cf. Virus.]
   To wither; to dry. [Prov. Eng. & Scot.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wizen \Wiz"en\, a.
   Wizened; thin; weazen; withered.
   [1913 Webster]

         A little lonely, wizen, strangely clad boy. --Dickens.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wizen \Wiz"en\, n.
   The weasand. [Prov. Eng. & Scot.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

wizen
    adj 1: 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.F.Starkie; "he
           did well despite his withered arm"; "a wizened little man
           with frizzy grey hair" [syn: shriveled, shrivelled,
           shrunken, withered, wizen, wizened]

Moby Thesaurus II by Grady Ward, 1.0:

74 Moby Thesaurus words for "wizen":
   Sanforize, age, air-dry, anhydrate, attenuate, bake, blot, brush,
   burn, cheat the undertaker, consume, cure, decline, decrease,
   dehumidify, dehydrate, desiccate, diminish, dodder, drain, droop,
   dry, dry up, dwindle, emacerate, emaciate, evaporate, exsiccate,
   fade, fade away, fail, fire, flag, get along, get on, grow old,
   insolate, kiln, languish, macerate, mummify, mummy, parch, pine,
   preshrink, reduce, rub, scorch, sear, shake, shrink, shrivel, sink,
   smoke, soak up, sponge, sun, sun-dry, swab, thin, torrefy, totter,
   towel, turn gray, turn white, wane, waste, waste away, weazen,
   welter, wilt, wipe, wither, wrinkle