adj. (US disheveled) (of the hair, a person, etc.) untidy; ruffled; disordered.
Derivatives:
dishevel v.tr. (dishevelled, dishevelling; US disheveled, disheveling). dishevelment n.
Etymology: ME dischevelee f. OF deschevel{eacute} past part. (as DIS-, chevel hair f. L capillus)