Source : Webster's Revised Unabridged Dictionary (1913)

Unfair \Un*fair"\, a. [AS. unf[ae]ger unlovely. See {Un-} not,
   and {Fair}, a.]
   Not fair; not honest; not impartial; disingenuous; using or
   involving trick or artifice; dishonest; unjust; unequal.

         You come, like an unfair merchant, to charge me with
         being in your debt.                      --Swift.
   -- {Un*fair"ly}, adv -- {Un*fair"}ness, n.

Source : WordNet®

unfairly
     adv : in an unfair manner; "they dealt with him unfairly"; "their
           accusations hit below the belt" [syn: {below the belt}]
           [ant: {fairly}]