Source : Webster's Revised Unabridged Dictionary (1913)

Ill-used \Ill`-used"\, a.
   Misapplied; treated badly.

Source : WordNet®

ill-used
     adj : of persons; taken advantage of; "after going out of his way
           to help his friend get the job he felt not appreciated
           but used" [syn: {exploited}, {put-upon}, {used}, {victimized},
            {victimised}]